Index of Latin Names

Abeliophyllum distichum Nakai — white forsythia — 7 images
Abies balsamea (L.) P.Miller — balsam fir — 28 images
Abies concolor (Gordon & Glend.) Lindley ex Hildebrand — white fir, Colorado fir — 10 images
Abutilon theophrasti Medicus — velvetleaf, velvet plant, velvetweed, crownweed, buttonweed, Chinese jute — 8 images
Acalypha gracilens A.Gray — slender three-seeded mercury — 8 images
Acalypha rhomboidea Raf. — broad three-seeded mercury — 18 images
Acalypha virginica L. — Virginia three-seeded mercury — 10 images
Acer campestre L. — hedge maple, field maple — 3 images
Acer ginnala Maxim. — Amur maple — 7 images
Acer negundo L. var. negundo — boxelder — 17 images
Acer negundo var. violaceum (Kirsch.) Jaeg. — purple boxelder — 23 images
Acer palmatum Thunb. — Japanese maple — 8 images
Acer pensylvanicum L. — striped maple — 34 images
Acer platanoides L. — Norway maple — 36 images
Acer pseudoplatanus L. — sycamore maple — 20 images
Acer rubrum L. — red maple — 117 images
Acer saccharinum L. — silver maple — 39 images
Acer saccharum Marsh. — sugar maple — 30 images
Acer spicatum Lam. — mountain maple — 16 images
Acer tataricum L. — Tatarian maple — 4 images
Achillea millefolium ssp. lanulosa (Nutt.) Piper — common yarrow, seaside yarrow — 23 images
Acorus americanus (Raf.) Raf. — several-veined sweetflag, American sweetflag — 2 images
Acorus calamus L. — single-veined sweetflag — 18 images
Actaea pachypoda Ell. — doll's eyes, white baneberry — 24 images
Actaea rubra (Aiton) Willd. — red baneberry — 21 images
Actinidia arguta (Sieb. & Zucc.) Planchon ex Miq. — bower actinidia, taravine — 21 images
Adiantum pedatum L. — northern maidenhair fern — 13 images
Aegopodium podagraria L. — goutweed — 33 images
Aesculus hippocastanum L. — horse chestnut — 18 images
Aesculus parviflora Walt. — bottlebrush buckeye — 16 images
Aethusa cynapium L. — fool's parsley — 13 images
Agalinis acuta Pennell — sandplain false foxglove, sandplain gerardia — 8 images
Agalinis maritima (Raf.) Raf. ssp. maritima — saltmarsh false foxglove, seaside gerardia — 18 images
Agalinis paupercula (A.Gray) Britton var. paupercula — small-flowered false foxglove, small-flowered gerardia — 16 images
Agalinis purpurea (L.) Pennell — purple false foxglove, purple gerardia — 33 images
Agalinis tenuifolia (Nutt.) Pennell — small-flowered slender false foxglove, small-flowered slender gerardia — 6 images
Ageratina altissima (L.) King & H.E.Robinson — white snakeroot — 20 images
Ageratina aromatica (L.) Spach — lesser snakeroot, aromatic snakeroot — 6 images
Agrimonia gryposepala Wallr. — common agrimony, woodland agrimony — 36 images
Agrimonia striata Michaux — coarse agrimony, grooved agrimony — 17 images
Agropyron cristatum (L.) Gaertner — crested wheatgrass — 2 images
Agrostis canina L. — velvet bentgrass, brown bentgrass — 6 images
Agrostis capillaris L. — Rhode Island bentgrass — 4 images
Agrostis gigantea Roth — black bentgrass, redtop — 6 images
Agrostis perennans (Walter) Tuckerman — upland bentgrass, upland bent, autumn bent — 8 images
Agrostis scabra Willd. — rough bentgrass, winter bent, hairgrass, northern ticklegrass — 17 images
Agrostis stolonifera L. — marsh bentgrass, carpet bentgrass, creeping bentgrass, creeping bent, spreading bent, fiorin — 4 images
Ailanthus altissima (P.Miller) Swingle — tree-of-heaven — 77 images
Aira caryophyllea L. — silvery hairgrass — 10 images
Aira praecox L. — strict hairgrass — 13 images
Ajuga genevensis L. — Geneva bugleweed, standing bugle — 5 images
Ajuga reptans L. — carpet bugleweed, common bugle, blue bugle — 18 images
Akebia quinata (Houtt.) Dcne. — chocolate vine, five-leaved akebia — 28 images
Albizia julibrissin Durazz. — silk tree — 1 images
Alchemilla mollis (Buser) Rothm. — garden lady's mantle — 2 images
Alchemilla vulgaris L. — common lady's mantle — 7 images
Aletris farinosa L. — white colic root, unicorn root, white stargrass, crowcorn — 9 images
Alisma subcordatum Raf. — lesser water plantain, southern water plantain — 24 images
Alisma triviale Pursh — larger water plantain, northern water plantain — 8 images
Alliaria petiolata (Bieb.) Cavara & Grande — garlic mustard — 23 images
Allium canadense L. ssp. canadense — wild garlic — 10 images
Allium carinatum L. — keeled garlic, witch's garlic — 8 images
Allium oleraceum L. — European wild garlic — 7 images
Allium sativum L. — garlic — 4 images
Allium schoenoprasum L. — wild chives — 5 images
Allium tricoccum Aiton var. tricoccum — wild leek — 7 images
Allium tuberosum Rottler ex Spreng. non Roxb. — garlic chives, Chinese chives, Chinese leek — 7 images
Allium vineale L. — field garlic — 10 images
Alnus glutinosa (L.) Gaertner — European black alder — 27 images
Alnus rugosa (Du Roi) Spreng. — speckled alder — 47 images
Alnus serrulata (Ait.) Willd. — smooth alder, common alder — 44 images
Alopecurus pratensis L. — meadow foxtail — 9 images
Amaranthus blitoides S.Watson — prostrate amaranth, tumbleweed — 9 images
Amaranthus blitum ssp. emarginatus (Moq. ex Uline & Bray) Carreter — livid amaranth — 7 images
Amaranthus cannabinus (L.) Sauer — tidal marsh amaranth, saltmarsh waterhemp, waterhemp ragweed — 14 images
Amaranthus caudatus L. — love-lies-bleeding, purple amaranth — 7 images
Amaranthus cruentus × A. powellii — blood amaranth × Powell's amaranth — 7 images
Amaranthus hybridus L. — slim amaranth, smooth pigweed — 9 images
Amaranthus hypochondriacus L. — prince's feather amaranth — 2 images
Amaranthus powellii S.Watson — Powell's amaranth — 8 images
Amaranthus retroflexus L. — pigweed, redroot amaranth — 2 images
Amaranthus viridis L. — slender amaranth, green amaranth — 7 images
Ambrosia artemisiifolia L. — annual ragweed — 26 images
Ambrosia psilostachya DC. — western ragweed — 2 images
Amelanchier arborea (Michaux f.) Fern. — downy serviceberry — 16 images
Amelanchier bartramiana (Tausch) Roemer — Bartram's shadbush, Bartram's serviceberry, Bartram's juneberry, mountain shadbush, mountain serviceberry, mountain juneberry — 17 images
Amelanchier canadensis (L.) Medicus — thicket shadbush, thicket serviceberry, eastern serviceberry, Canadian serviceberry, shadbush serviceberry, juneberry, shad-blow, — 58 images
Amelanchier laevis Wiegand — smooth shadbush, smooth serviceberry, Allegheny serviceberry — 12 images
Amelanchier micropetala (B.L.Robins) Ashe — small-petaled shadbush — 16 images
Amelanchier nantucketensis Bickn. — Nantucket shadbush, Nantucket serviceberry, Nantucket juneberry — 18 images
Amelanchier sanguinea (Pursh) DC. — round-leaved shadbush, New England serviceberry — 4 images
Amelanchier spicata (Lam.) K.Koch — thicket shadbush, running shadbush, running serviceberry, dwarf serviceberry, low serviceberry, low juneberry — 46 images
Amelanchier ×intermedia Spach — intermediate shadbush, intermediate serviceberry — 61 images
Amelanchier ×neglecta Eggleston ex G.N.Jones — overlooked shadbush, overlooked serviceberry — 4 images
Ammophila breviligulata Fern. — dune grass — 32 images
Amorpha fruticosa L. — indigo bush, false indigo — 21 images
Ampelopsis brevipedunculata C.L.Li — Amur peppervine, porcelain berry — 23 images
Amphicarpaea bracteata (L.) Fern. — hog peanut — 20 images
Amsonia hubrichtii Woodson — Arkansas bluestar — 13 images
Anagallis arvensis L. — scarlet pimpernel — 17 images
Anaphalis margaritacea (L.) Benth. & Hook.f. — pearly everlasting — 15 images
Andromeda polifolia var. glaucophylla (Link) DC. — bog rosemary — 3 images
Andropogon gerardii Vitman — big bluestem — 36 images
Andropogon glomeratus (Walter) B.S.P. — bunched broomsedge, bushy bluestem — 31 images
Andropogon virginicus L. — broomsedge bluestem, bushy bluestem, Virginia broomsedge — 7 images
Anemone canadensis L. — Canada anemone — 2 images
Anemone nemorosa L. — European windflower — 5 images
Anemone quinquefolia L. — wood anemone, windflower — 40 images
Anemone ranunculoides L. — yellow wood anemone, European buttercup anemone — 15 images
Anemone virginiana L. var. virginiana — stout thimbleweed — 12 images
Angelica lucida L. — seaside angelica — 27 images
Antennaria fallax (Greene) Bayer & Stebbins — broad-leaved pussytoes — 4 images
Antennaria neglecta Greene — field pussytoes — 8 images
Antennaria neodioica (Greene) Bayer — Greene's pussytoes — 10 images
Antennaria plantaginifolia (L.) Richardson — plantain-leaved pussytoes — 19 images
Anthemis arvensis L. — dog chamomile, corn chamomile — 9 images
Anthoxanthum aristatum var. aristatum Pérez-Lara — awned vernalgrass, Puel's vernalgrass — 3 images
Anthoxanthum odoratum L. — sweet vernalgrass — 21 images
Anthriscus sylvestris (L.) Hoffmann — chervil — 12 images
Aphanes australis Rydberg — slender parsley-piert — 16 images
Apios americana Medik. — groundnut — 40 images
Apocynum androsaemifolium L. — spreading dogbane — 15 images
Apocynum cannabinum L. — Indian hemp — 14 images
Apocynum ×floribundum Greene — hybrid dogbane — 5 images
Aquilegia canadensis L. — wild columbine, red columbine — 43 images
Aquilegia vulgaris L. — garden columbine, European columbine — 7 images
Arabidopsis thaliana (L.) Heynh. — mouse-ear cress — 51 images
Arabis canadensis (L.) Al-Shehbaz — sickle-pod — 19 images
Arabis drummondii (Graham) Al-Shehbaz — Drummond's rock-cress — 19 images
Arabis glabra L. — tower mustard — 32 images
Arabis laevigata (Muhl. ex Willd.) Al-Shehbaz — smooth rock-cress — 1 images
Aralia elata (Miq.) Seem. — Japanese angelica tree — 28 images
Aralia hispida Vent. — bristly sarsaparilla — 36 images
Aralia nudicaulis L. — wild sarsaparilla — 46 images
Aralia racemosa L. — American spikenard — 18 images
Arceuthobium pusillum Peck — eastern dwarf mistletoe — 3 images
Arctium lappa L. — great burdock — 5 images
Arctium minus Bernh. — lesser burdock, common burdock — 11 images
Arctostaphylos uva-ursi (L.) Sprengel — bearberry — 40 images
Arenaria serpyllifolia L. — thyme-leaved sandwort — 16 images
Arethusa bulbosa L. — dragon's mouth — 7 images
Arisaema stewardsonii Britton — swamp Jack-in-the-pulpit — 14 images
Arisaema triphyllum (L.) Schott ex Schott & Endl. — woodland Jack-in-the-pulpit — 32 images
Aristida basiramea Engelm. ex Vasey — fork-tipped threeawn — 8 images
Aristida dichotoma Michaux — poverty grass — 29 images
Aristida longespica var. geniculata (Raf.) Fern. — barrens needlegrass — 11 images
Aristida oligantha Michaux — prairie needlegrass — 5 images
Aristida tuberculosa Nutt. — seebeach needlegrass — 14 images
Aristolochia macrophylla (Lam.) C.F.Reed — large-leaved Dutchman's pipe — 3 images
Aristolochia tomentosa (Sims) Huber — woolly pipevine — 4 images
Aronia arbutifolia (L.) Ell. — red chokeberry — 3 images
Aronia melanocarpa (Michx.) Ell. — black chokeberry — 37 images
Aronia mitschurinii Skvorts. — cultivar 'Viking' — 3 images
Aronia ×prunifolia (Lindl.) Spach — purple chokeberry — 52 images
Arrhenatherum elatius (L.) J. & K.Presl — tall oatgrass — 17 images
Artemisia annua L. — sweet wormwood, Asian annual wormwood — 16 images
Artemisia campestris ssp. caudata (Michaux) Hall & Clements — seaside wormwood, tall wormwood — 19 images
Artemisia stelleriana Bess. — dustymiller, beach wormwood — 16 images
Artemisia tridentata Nutt. — sagebrush — 8 images
Artemisia vulgaris L. — mugwort, European common wormwood — 23 images
Aruncus dioicus (Walter) Fern. — goat's beard — 4 images
Asarum canadense L. — Canadian wild ginger — 19 images
Asarum caudatum Lindl. — long-tailed wild ginger, western wild ginger — 6 images
Asclepias amplexicaulis Sm. — clasping milkweed — 35 images
Asclepias exaltata L. — tall milkweed — 11 images
Asclepias incarnata ssp. pulchra (Ehrh. ex Willd.) Woodson — downy swamp milkweed — 41 images
Asclepias purpurascens L. — purple milkweed — 5 images
Asclepias quadrifolia Jacq. — four-leaved milkweed — 3 images
Asclepias syriaca L. — common milkweed — 32 images
Asclepias tuberosa L. — butterfly milkweed — 32 images
Asclepias verticillata L. — whorled milkweed — 8 images
Asimina triloba (L.) Dunal — American papaw, common pawpaw — 2 images
Asparagus officinalis L. — garden asparagus — 16 images
Asplenium platyneuron (L.) B.S.P. — ebony spleenwort — 27 images
Asplenium quadrivalens (D.E.Meyer) Landolt — western maidenhair spleenwort — 2 images
Asplenium trichomanes L. — maidenhair spleenwort — 7 images
Aster (Ell.) Nesom — smooth white oldfield aster — 10 images
Aster (s. str.) indicus (L.) All. — Indian aster — 25 images
Aster acuminatus (Michaux) Nesom — whorled wood aster — 31 images
Aster cordifolius (L.) Nesom — blue heartleaf aster — 15 images
Aster divaricatus (L.) G.L.Nesom — white wood aster — 15 images
Aster dumosus (L.) G.L.Nesom — long-stalked aster, bushy aster, rice-button aster — 15 images
Aster ericoides (L.) G.L.Nesom var. ericoides — heath white aster, squarrose white aster — 11 images
Aster laevis (L.) A. & D.Löve var. laeve — smooth aster — 14 images
Aster lanceolatus (Willd.) G.L.Nesom ssp. lanceolatum var. lanceolatum — tall white or panicled aster — 2 images
Aster lateriflorus (L.) A. & D.Löve — calico aster, goblet aster — 22 images
Aster macrophyllus (L.) Cass. — large-leaved aster — 22 images
Aster nemoralis (Aiton) Greene — bog aster — 12 images
Aster novae-angliae (L.) G.L.Nesom — New England aster — 25 images
Aster novi-belgii (L.) Nesom var. novi-belgii — New York aster — 49 images
Aster patens (Aiton) G.L.Nesom var. patens — clasping aster, skydrops, skydrop aster — 20 images
Aster pilosus (Willd.) G.L.Nesom var. pilosum — white oldfield aster, hairy aster, awl aster — 49 images
Aster pilosus var. pringlei (A.Gray) G.L.Nesom — Pringle's aster — 10 images
Aster puniceus (L.) A. & D.Löve var. puniceum — bristly aster, swamp aster — 37 images
Aster radula (Aiton) Nesom — rough aster — 13 images
Aster spectabilis (Aiton) Nesom — showy aster — 52 images
Aster subulatus (Michaux) G.L.Nesom var. subulatum — annual saltmarsh aster, small-flowered saltmarsh aster — 15 images
Aster tenuifolius (L.) G.L.Nesom var. tenuifolium — perennial saltmarsh aster, large-flowered saltmarsh aster — 31 images
Aster tradescantii (L.) G.L.Nesom — Tradescant's aster — 9 images
Aster umbellatus (P.Mill) Nees var. umbellata — tall flat-topped white aster — 37 images
Aster undulatus (L.) G.L.Nesom — clasping hartleaf aster, wavyleaf aster — 31 images
Aster ×blakei (Porter) G.L.Nesom — Blake's aster — 2 images
Astragalus canadensis L. — Canada milkvetch, Canadian milkvetch — 2 images
Athyrium asplenioides (Michaux) Desv. — southern ladyfern — 3 images
Athyrium filix-femina var. angustum (Willd.) C.Presl — northern ladyfern — 45 images
Atriplex cristata Humb. & Bonpl. ex Willd. — seabeach orache — 11 images
Atriplex glabriuscula Edmondston — smooth orache, Scotland orache — 12 images
Atriplex littoralis L. — seaside orache — 8 images
Atriplex prostrata Boucher ex DC. — halberd-leaf orache, prostrate orache — 23 images
Aureolaria flava (L.) Farw. var. flava — smooth yellow false foxglove — 14 images
Aureolaria pedicularia (L.) Raf. var. pedicularia — fernleaf yellow false foxglove — 37 images
Aureolaria virginica (L.) Pennell — downy yellow false foxglove — 27 images
Avena sativa L. — cultivated oat — 1 images
Azolla caroliniana Willd. — mosquito fern — 4 images
Baccharis halimifolia L. — seamyrtle, groundseltree, saltbush, eastern false willow — 53 images
Baptisia australis (L.) R.Br. ex Ait.f. var. australis — blue false indigo — 10 images
Baptisia tinctoria (L.) R.Br. ex Ait.f. — yellow wild indigo, horsefly weed — 19 images
Barbarea stricta Andrz. — upright yellow rocket — 3 images
Barbarea verna (P.Mill.) Aschers. — early yellow rocket, early wintercress — 6 images
Barbarea vulgaris W.T. Aiton — common yellow rocket, common wintercress — 47 images
Bartonia paniculata (Michaux) Muhl. ssp. paniculata — panicled screwstem — 6 images
Bartonia virginica (L.) B.S.P. — yellow screwstem, Virginia screwstem — 23 images
Berberis thunbergii DC. — Japanese barberry — 36 images
Berberis vulgaris L. — common barberry — 24 images
Berberis ×ottawensis C.K.Schneid. — hybrid barberry — 4 images
Berteroa incana (L.) DC. — hoary alyssum — 15 images
Berteroa mutabilis (Vent.) DC. — flatpod alyssum — 1 images
Betula alleghaniensis Britton — yellow birch — 54 images
Betula cordifolia Regel — heartleaf paper birch, mountain paper birch — 6 images
Betula lenta L. — sweet birch, cherry birch, black birch — 36 images
Betula nigra L. — river birch — 35 images
Betula papyrifera Marsh. — paper birch — 43 images
Betula papyrifera Marsh. × B. populifolia Marsh. — paper birch × gray birch — 15 images
Betula pendula Roth — silver birch — 12 images
Betula pendula × B. populifolia — European silver birch × American gray birch — 4 images
Betula populifolia Marsh. — gray birch — 49 images
Betula pubescens Ehrh. — European downy birch — 6 images
Betula pumila L. — swamp birch, fen birch — 8 images
Betula sp. — exotic birch — 10 images
Bidens cernua L. — nodding bur-marigold, nodding beggarticks — 32 images
Bidens connata Muhl. ex Willd. — swamp beggarticks — 15 images
Bidens coronata (Michaux) Britton — northern tickseed sunflower — 18 images
Bidens discoidea (Torrey & A.Gray) Britton — small beggarticks — 8 images
Bidens frondosa L. — common beggarticks, devil's pitchforks — 22 images
Bidens laevis (L.) B.S.P. — smooth marigold — 5 images
Bidens polylepis Blake — Ozark beggarticks — 10 images
Bidens tripartita L. — leafy-bracted beggarticks — 4 images
Bidens vulgata Greene — tall beggarticks — 11 images
Boehmeria cylindrica (L.) Sw. — false nettle, bog hemp — 22 images
Boltonia asteroides var. latisquama (A.Gray) Cronq. — Plains white doll's daisy, Plains false aster — 7 images
Botrychium dissectum Sprengel — cut-leaved grapefern — 11 images
Botrychium matricariifolium (Doll) A.Braun ex W.D.J.Koch — daisyleaf moonwort — 5 images
Botrychium oneidense (Gilbert) House — blunt-lobed grapefern — 21 images
Botrychium virginianum (L.) Sw. — rattlesnake fern — 13 images
Bouteloua curtipendula (Michaux) Torrey — sideoats grama — 15 images
Brachyelytrum aristosum (Michaux) Trel. — woodgrass — 15 images
Brachyelytrum erectum (Schreber ex Sprengel) Beauv. — awned woodgrass, bearded shorthusk — 5 images
Brasenia schreberi J.F.Gmelin — watershield — 42 images
Brassica juncea (L.) Czern. — brown mustard — 3 images
Brassica rapa L. — turnip — 7 images
Briza maxima L. — big quaking grass — 5 images
Bromus arvensis L. — field chess — 3 images
Bromus commutatus Schrader — hairy chess — 3 images
Bromus hordeaceus L. — soft brome — 5 images
Bromus inermis Leysser — awnless brome, smooth brome — 12 images
Bromus pubescens Muhl. ex Willd. — woodland brome or Canada brome — 6 images
Bromus sterilis L. — barren brome — 4 images
Bromus tectorum L. — drooping brome, downy chess — 10 images
Buddleja davidii Franch. — butterfly bush, summer lilac — 26 images
Bulbostylis capillaris (L.) Kunth ex C.B.Clarke — tufted hairsedge, sandsedge — 28 images
Buxus sempervirens L. — European common box, European boxwood — 4 images
Cabomba caroliniana A.Gray — Carolina fanwort — 50 images
Cakile edentula (Bigelow) Hooker ssp. edentula var. edentula — sea rocket — 22 images
Calamagrostis canadensis (Michaux) Beauv. var. canadensis — Canada bluejoint, reedgrass — 50 images
Calamagrostis canadensis var. langsdorffii (Link) Inman — Langsdorff's bluejoint — 4 images
Calamagrostis cinnoides (Muhl.) W.Barton — reed bluejoint — 22 images
Calamagrostis epigeios (K.Koch) Ledeb. — feathertop, bushgrass — 28 images
Calamagrostis pickeringii A.Gray — Pickering's reedgrass — 23 images
Calla palustris L. — water arum, wild calla — 19 images
Callicarpa japonica Thunb. — Japanese callicarpa — 10 images
Callitriche heterophylla Pursh var. heterophylla — greater water starwort, two-headed water starwort, variable water starwort — 40 images
Callitriche palustris L. — spring water starwort, vernal water starwort, narrow-fruited water starwort, spiny water starwort — 3 images
Callitriche stagnalis Scop. — pond water starwort, common European water starwort — 36 images
Calluna vulgaris (L.) Hull — Scotch heather — 24 images
Calopogon tuberosus (L.) B.S.P. — tuberous grasspink — 14 images
Caltha palustris L. — marsh marigold — 16 images
Calycanthus floridus var. glaucus (Willd.) Torrey & A.Gray — eastern sweetshrub — 6 images
Calystegia sepium (L.) R.Br. ssp. sepium — European morning glory, European hedge bindweed — 10 images
Calystegia sepium ssp. americana (Sims) Brummitt — American morning glory — 11 images
Campanula glomerata L. — clustered bellflower — 2 images
Campanula persicifolia L. — peach-leaved bellflower — 6 images
Campanula rapunculoides L. — rampion bellflower, creeping bellflower — 13 images
Campsis radicans (L.) Seemann ex Bureau — trumpet creeper — 17 images
Cannabis sativa L. — marijuana, hemp — 2 images
Capsella bursa-pastoris (L.) Medicus — shepherd's purse — 22 images
Cardamine bulbosa (Schreb. ex Muhl.) B.S.P. — bulbous bittercress, spring cress — 7 images
Cardamine concatenata (Michaux) Sw. — cut-leaved toothwort, five-parted toothwort — 6 images
Cardamine diphylla (Michaux) Wood — crinkleroot, two-leaved toothwort — 17 images
Cardamine flexuosa With. — greater bittercress, wavy bittercress — 44 images
Cardamine hirsuta L. — hoary bittercress, hairy rock-cress — 42 images
Cardamine impatiens L. — narrowleaf bittercress, bushy rock-cress — 16 images
Cardamine longii Fern. — Long's bittercress — 2 images
Cardamine parviflora var. arenicola (Britton) O.E.Schulz — small-flowered bittercress — 24 images
Cardamine pensylvanica Muhl. ex Willd. — common bittercress, Pennsylvania bittercress — 6 images
Cardamine pratensis L. — cuckoo flower — 22 images
Carduus nutans L. — nodding thistle, nodding plumeless thistle, musk thistle — 28 images
Carex abscondita Mackenzie — concealed sedge — 3 images
Carex albicans var. emmonsii (Dewey ex Torrey) J.Rettig — Emmons' sedge — 10 images
Carex albursina Sheldon — white bear sedge — 1 images
Carex annectens (Bickn.) Bickn. — yellow-fruited fox sedge — 18 images
Carex appalachica Webber & Ball — Appalachian sedge, spreading star sedge — 6 images
Carex arctata Boott ex Hooker — northern wood sedge, drooping wood sedge — 3 images
Carex argyrantha Tuckerman — silvery sedge — 10 images
Carex atlantica ssp. capillacea (Bailey) Reznicek — threadstem sedge, Howe's prickly sedge — 10 images
Carex billingsii (Knight) C.D.Kirschbaum — three-seeded bog sedge — 6 images
Carex blanda Dewey — woodland sedge — 13 images
Carex brevior (Dewey) Mack. ex Lunell — short fescue sedge — 11 images
Carex bromoides Schkuhr ex Willd. — brome-like sedge — 6 images
Carex brunnescens (Tuckerman) Kükenth. — brownish sedge — 7 images
Carex bullata Schkuhr ex Willd. — button sedge — 27 images
Carex buxbaumii Wahlenb. — Buxbaum's sedge — 6 images
Carex canescens ssp. disjuncta (Fern.) Toivonen — silvery bog sedge — 23 images
Carex caryophyllea Lat. — vernal sedge — 14 images
Carex cephalophora Muhl. ex Willd. — oval-headed sedge — 16 images
Carex cf. mackenziei Krecz. — Mackenzie's sedge — 7 images
Carex communis Bailey var. communis — fibrous-rooted sedge, colonial sedge — 2 images
Carex comosa Boott — bristly sedge — 33 images
Carex conoidea Schkuhr ex Willd. — field sedge — 5 images
Carex crawfordii Fernald — Crawford's sedge — 8 images
Carex crinita Lam. var. crinita — fringed sedge, awned sedge — 21 images
Carex cumulata (Bailey) Mackenzie — crowded sedge — 12 images
Carex debilis var. rudgei L.H.Bailey — northern stalked sedge — 9 images
Carex deweyana Schweinitz — round-fruited short-scaled sedge — 7 images
Carex digitalis Willd. — slender wood sedge, slender-spiked woodland sedge — 5 images
Carex echinata Murray — prickly sedge — 3 images
Carex flava L. — yellow sedge — 7 images
Carex folliculata L. — long-culmed sedge — 21 images
Carex gracillima Schwein. — slender drooping sedge, graceful sedge — 2 images
Carex granularis Muhl. ex Willd. — meadow sedge — 3 images
Carex gynandra Schwein. — northern awned sedge — 8 images
Carex haydenii Dewey — Hayden's sedge — 15 images
Carex hirta L. — hairy sedge — 5 images
Carex hormathodes Fernald — saltmarsh straw sedge — 17 images
Carex intumescens Rudge — bladder sedge, swamp sedge — 19 images
Carex lacustris Willd. — marsh sedge, lakeside sedge — 14 images
Carex laevivaginata (Kükenth.) Mackenzie — smooth-sheathed sedge — 4 images
Carex lasiocarpa ssp. americana (Fern.) D.Löve & Bernard — slender woolly fruited sedge — 29 images
Carex laxiculmis Schwein. — spreading woodland sedge — 11 images
Carex laxiflora Lam. — loose-flowered woodland sedge — 27 images
Carex leptalea Wahlenb. — delicate sedge — 4 images
Carex leptonervia (Fern.) Fern. — one-nerved woodland sedge — 8 images
Carex limosa L. — mud sedge — 5 images
Carex longii Mackenzie — Long's sedge — 36 images
Carex lucorum Willd. ex Link — long-beaked Pennsylvania sedge — 16 images
Carex lupuliformis Sartwell ex Dewey — false hop sedge — 2 images
Carex lupulina Muhl. ex Willd. — hop sedge — 21 images
Carex lurida Wahlenb. — sallow sedge — 35 images
Carex muhlenbergii Schkuhr ex Willd. — Muhlenberg's sedge — 3 images
Carex nigra (L.) Reichard — black sedge — 6 images
Carex normalis Mackenzie — big straw sedge — 4 images
Carex novae-angliae Schwein. — New England sedge — 2 images
Carex oligosperma Michaux — fewfruited sedge, fewseeded sedge — 13 images
Carex paleacea Schreber ex Wahlenb. — saltmarsh sedge — 7 images
Carex pallescens L. — pale sedge — 18 images
Carex panicea L. — millet sedge — 11 images
Carex pellita Muhl. — broad-leaved woolly fruited sedge — 9 images
Carex pensylvanica Lam. — Pennsylvania sedge — 27 images
Carex plantaginea Lam. — plantain-leaf sedge — 6 images
Carex platyphylla Carey — broad-leaved woodland sedge — 3 images
Carex polymorpha Muhl. — variable sedge — 8 images
Carex praegracilis W.Boott — freeway sedge — 10 images
Carex prasina Wahlenb. — twisted drooping sedge — 7 images
Carex projecta Mackenzie — beaded broom sedge, necklace broom sedge — 8 images
Carex pseudocyperus L. — galingale sedge — 13 images
Carex radiata (Wahlenb.) Small — star sedge — 9 images
Carex retroflexa Muhl. ex Willd. — reflexed sedge — 7 images
Carex rosea Schkuhr ex Willd. — big star sedge — 11 images
Carex scoparia Schkuhr ex Willd. — broom sedge — 19 images
Carex siccata Dewey — dryspike sedge — 6 images
Carex silicea Olney — seabeach sedge — 26 images
Carex spicata Hudson — European star sedge — 9 images
Carex stipata Muhl. ex Willd. — awl-fruited sedge — 17 images
Carex straminea Willd. ex Schkuhr — straw sedge — 14 images
Carex striata Michx. — Walter's sedge — 19 images
Carex stricta Lam. — tussock sedge — 21 images
Carex stricta var. strictior (Dewey) Carey — stiff sedge — 19 images
Carex swanii (Fern.) Mackenzie — Swan's sedge — 27 images
Carex tenera Dewey — slender straw sedge — 8 images
Carex tonsa (Fern.) Bickn. var. tonsa — stiff-leaved sand sedge, shaved sedge — 26 images
Carex tonsa var. rugosperma (Mackenzie) W.J.Crins — sand sedge — 6 images
Carex torta Boott ex Tuckerman — riverside sedge — 9 images
Carex tribuloides Wahlenb. — blunt broom sedge — 20 images
Carex trisperma Dewey — three-seeded bog sedge — 16 images
Carex typhina Michaux — cattail sedge — 4 images
Carex umbellata Schkuhr ex Willd. — parasol sedge, short-beaked sand sedge — 8 images
Carex utriculata Boott — bottle sedge, beaked sedge — 29 images
Carex vesicaria L. — inflated sedge — 7 images
Carex vestita Willd. — velvet-fruited sedge — 29 images
Carex virescens Muhl. ex Willd. — ribbed sedge — 18 images
Carex vulpinoidea Michaux — fox sedge — 21 images
Carpinus caroliniana Walter — ironwood, hornbeam — 26 images
Carya cordiformis (Wangenh.) K.Koch — bitternut hickory, swamp hickory — 13 images
Carya glabra (P.Miller) Sweet — pignut hickory — 30 images
Carya ovalis (Wangenh.) Sarg. — sweet pignut hickory, red hickory — 4 images
Carya ovata (P.Miller) K.Koch — shagbark hickory — 31 images
Carya tomentosa (Lam. ex Poiret) Nutt. — mockernut hickory — 27 images
Castanea dentata (Marsh.) Borkh. — American chestnut — 60 images
Castanea mollissima Blume — Chinese chestnut — 9 images
Castanea pumila (L.) P.Miller — chinquapin — 5 images
Catalpa bignonioides Walter — southern catalpa, Indian bean tree — 16 images
Catalpa ovata G.Don — yellow catalpa, Chinese catalpa — 6 images
Catalpa speciosa (Warder) Warder ex Engelm. — cigar tree, northern catalpa — 8 images
Caulophyllum thalictroides (L.) Michaux — blue cohosh — 8 images
Ceanothus americanus L. — New Jersey tea — 20 images
Cedrus libani A.Rich. — cedar of Lebanon — 2 images
Celastrus orbiculatus Thunb. — Oriental bittersweet, Asian bittersweet — 92 images
Celastrus orbiculatus × C. scandens — hybrid bittersweet — 5 images
Celastrus scandens L. — American bittersweet — 3 images
Celtis occidentalis L. — common hackberry — 40 images
Cenchrus spinifex Cav. — coastal sandbur — 10 images
Centaurea cyanus L. — cornflower, bachelor's button — 2 images
Centaurea jacea L. — brown knapweed — 2 images
Centaurea montana L. — mountain knapweed — 2 images
Centaurea nigra L. — black knapweed — 3 images
Centaurea nigrescens Willd. — Tyrol knapweed, Vochin knapweed, Wocheiner knapweed, short-fringed knapweed — 7 images
Centaurea phrygia L. — wig knapweed — 8 images
Centaurea stoebe ssp. micranthos (Gugler) Hayek — spotted knapweed, bushy knapweed — 94 images
Centaurea ×moncktonii C.E.Britton — Monckton's knapweed — 34 images
Centaurium erythraea Raf. — lesser centaury — 1 images
Centaurium pulchellum (Sw.) Druce — branching centaury — 4 images
Cephalanthus occidentalis L. — common buttonbush — 30 images
Cerastium fontanum ssp. vulgare (Hartman) Greuter & Burdet — common mouse-ear chickweed — 40 images
Cerastium glomeratum Thuill. — clammy mouse-ear chickweed — 9 images
Cerastium pumilum W.Curtis ssp. pumilum — dwarf mouse-ear chickweed — 7 images
Cerastium semidecandrum L. — little mouse-ear chickweed — 23 images
Cerastium strictum L. — American field chickweed — 1 images
Cerastium tomentosum L. — snow-in-summer — 8 images
Ceratophyllum demersum L. — hornwort, coontail — 15 images
Ceratophyllum echinatum A.Gray — forked coontail — 5 images
Cercidiphyllum japonicum Zieb. & Zucc. — katsura tree — 26 images
Cercis canadensis L. — redbud — 14 images
Chaenomeles speciosa (Sweet) Nakai — Japanese flowering quince — 15 images
Chamaecrista fasciculata (Michaux) Greene — partridge pea — 20 images
Chamaecrista nictitans (L.) Moench ssp. nictitans var. nictitans — sensitive partridge pea — 8 images
Chamaecyparis thyoides (L.) B.S.P. — Atlantic white cedar — 85 images
Chamaedaphne calyculata (L.) Moench — leatherleaf, cassandra — 54 images
Chamaenerion angustifolium (Mosquin) Hoch — American great willowherb, American fireweed — 9 images
Chelidonium majus L. — greater celandine — 16 images
Chelone glabra L. — white turtlehead — 26 images
Chenopodium album L. — pigweed, lamb's quarters — 31 images
Chenopodium ambrosioides (L.) Mosyakin & Clemants — Mexican tea, wormseed — 17 images
Chenopodium berlandieri var. macrocalycium (Aellen) Cronq. — seabeach pigweed — 35 images
Chenopodium glaucum L. var. glaucum — oakleaf goosefoot — 3 images
Chenopodium pumilio (R.Br.) Mosyakin & Clemants — ridged goosefoot, pygmy goosefoot — 9 images
Chenopodium rubrum L. var. rubrum — coast blite, red goosefoot — 14 images
Chenopodium simplex (Torrey) Raf. — mapleleaf goosefoot — 7 images
Chenopodium strictum ssp. glaucophyllum (Aellen) Aellen & Just. — glaucous pigweed — 4 images
Chenopodium urbicum L. — city goosefoot — 5 images
Chimaphila maculata (L.) Pursh — striped pipsissewa, spotted wintergreen — 22 images
Chimaphila umbellata ssp. cisatlantica (Blake) Hultén — pipsissewa — 9 images
Chionanthus virginicus L. — white fringetree — 14 images
Chionodoxa forbesii Baker — Forbes' glory-of-the-snow — 11 images
Chionodoxa luciliae Boiss. — Lucilia's glory-of-the-snow — 12 images
Chosenia arbutifolia (Pallas) A.Skv. — chosenia — 3 images
Chrysosplenium americanum Schwein. ex Hooker — golden saxifrage, watercarpet — 22 images
Cichorium intybus L. — common chicory — 13 images
Cicuta bulbifera L. — bulblet-bearing water hemlock — 19 images
Cicuta maculata L. — spotted water hemlock — 24 images
Cimicifuga racemosa L. — black cohosh, black snakeroot, bugbane — 6 images
Cinna arundinacea L. — common woodreed — 18 images
Circaea alpina L. — small enchanter's nightshade — 2 images
Circaea lutetiana ssp. canadensis (L.) Hill ssp. canadensis — enchanter's nightshade — 22 images
Cirsium arvense (L.) Scop. — Canada thistle — 13 images
Cirsium discolor (Muhl. ex Willd.) Sprengel — field thistle — 3 images
Cirsium horridulum Michaux — yellow thistle — 19 images
Cirsium pumilum (Nutt.) Sprengel — pasture thistle — 17 images
Cirsium vulgare (Savi) Ten. — bull thistle — 38 images
Cladium mariscoides (Muhl.) Torrey — smooth sawsedge, twigsedge — 32 images
Cladrastis kentukea (Dum.-Cours.) Rudd — yellowwood — 14 images
Claytonia caroliniana Michx. — broad-leaved springbeauty — 4 images
Claytonia virginica L. — narrow-leaved springbeauty — 16 images
Clematis terniflora DC. — yamleaf clematis — 22 images
Clematis virginiana L. — virgin's bower — 16 images
Clethra alnifolia L. — sweet pepperbush — 45 images
Clinopodium vulgare L. — wild basil — 23 images
Clintonia borealis (Aiton) Ref. — bluebead lily — 44 images
Collinsonia canadensis L. — northern horsebalm, stoneroot — 4 images
Collomia linearis Nutt. — tiny trumpet — 4 images
Colutea arborescens L. — bladder senna — 3 images
Comandra umbellata (L.) Nutt. — bastard toadflax — 32 images
Comarum palustre L. — marsh cinquefoil — 12 images
Commelina communis L. — dayflower — 3 images
Comptonia peregrina (L.) Coulter — sweetfern — 28 images
Conium maculatum L. — poison hemlock — 20 images
Conoclinium coelestinum (L.) DC. — blue mistflower — 5 images
Conopholis americana (L.) Wallr.f. — squaw-root, cancer-root — 12 images
Convallaria majalis L. — lily-of-the-valley — 34 images
Convolvulus arvensis L. — field bindweed — 4 images
Conyza canadensis (L.) Carr. — horseweed, hogweed, butterweed — 39 images
Coptis trifolia ssp. groenlandica (L.) Salisb. — threeleaf goldthread — 32 images
Corallorhiza trifida Chatelain — pale coralroot, early coralroot — 4 images
Corema conradii (Torrey) Torrey ex Loudon — broom crowberry — 49 images
Coreopsis lanceolata L. — lanceleaf tickseed — 32 images
Coreopsis rosea Nutt. — pink tickseed — 41 images
Cornus alternifolia (L.f.) Small — pagoda dogwood, alternate-leaved dogwood — 27 images
Cornus amomum (P.Miller) Small var. amomum — silky dogwood — 16 images
Cornus amomum var. schuetzeana (C.A.Mey.) A.Haines — oblique-leaf dogwood, pale dogwood — 24 images
Cornus canadensis (L.) Aschers. & Graebn. — bunchberry, dwarf cornel — 21 images
Cornus florida (L.) Spach — flowering dogwood — 50 images
Cornus florida × C. kousa — hybrid flowering dogwood — 3 images
Cornus kousa (Sieb. & Zucc.) H.Hara — big-bracted dogwood, kousa dogwood — 9 images
Cornus racemosa (Lam.) Moldenke — gray dogwood — 24 images
Cornus rugosa (Lam.) Rydb. — round-leaved dogwood, talus dogwood — 6 images
Cornus sanguinea (L.) Opiz — common dogwood, red dogwood — 4 images
Cornus sericea (L.) Holub — red osier, red-stemmed dogwood — 8 images
Coronilla varia (L.) Lassen — purple crownvetch — 9 images
Coronopus didymus L. — lesser swinecress — 16 images
Corydalis sempervirens (L.) Borkh. — rock harlequin, pale corydalis, pink corydalis — 28 images
Corydalis solida (L.) Clairv. — purple corydalis — 3 images
Corylus americana Walt. — American hazelnut — 33 images
Corylus colurna L. — Turkish hazel, filbert — 11 images
Corylus cornuta Marsh. — beaked hazelnut — 28 images
Cosmos bipinnatus Cav. — garden cosmos, Mexican aster — 3 images
Cotinus coggygria Scop. — Eurasian smoketree — 3 images
Cotinus obovatus Raf. — American smoketree — 5 images
Cotinus ×'Grace' — hybrid smoketree — 11 images
Cotoneaster divaricatus Rehd. & Wilson — spreading cotoneaster — 17 images
Cotoneaster salicifolius Franch. — willowleaf cotoneaster — 4 images
Crataegus crus-galli L. — cockspur hawthorn — 12 images
Crataegus macracantha Lodd. ex Loud. — largethorn hawthorn — 3 images
Crataegus macrosperma Ashe — largeseed hawthorn — 17 images
Crataegus monogyna Jacq. — English hawthorn — 10 images
Crataegus phaenopyrum (L.f.) Medicus — Washington hawthorn — 5 images
Crataegus pruinosa (Wendl.f.) K.Koch — frosted hawthorn — 4 images
Crataegus sp. — hawthorn — 11 images
Crataegus submollis Sarg. — downy hawthorn — 9 images
Crataegus succulenta Schrader ex Link var. succulenta — succulent hawthorn — 8 images
Crataegus ×fretalis Sarg. — Long Island Sound hawthorn — 7 images
Crepis capillaris (L.) Wallr. — smooth hawk's beard — 7 images
Crocus albiflorus Kit. ex Schult. — white crocus — 4 images
Crocus ancyrensis (Herb.) Maw — Ankara crocus — 2 images
Crocus chrysanthus (Herb.) Herb. — snow crocus, golden crocus — 2 images
Crocus tommasinianus Herb. — woodland crocus, early or snow crocus — 10 images
Crocus vernus (L.) Hill — spring crocus — 17 images
Crotalaria sagittalis L. — rattlebox — 21 images
Cryptotaenia canadensis (L.) DC. — American honewort — 5 images
Cryptotaenia japonica Hassk. — Japanese honewort — 4 images
Cucumis sativus L. — garden cucumber — 1 images
Cucurbita pepo L. — pumpkin — 1 images
Cuscuta campestris Yuncker — field dodder, prairie dodder — 27 images
Cuscuta cf. cephalanthi Engelm. — buttonbush dodder — 11 images
Cuscuta compacta Juss. ex Choisy — dense dodder, compact dodder — 8 images
Cuscuta coryli Engelm. — pondshore dodder — 21 images
Cuscuta gronovii Willd. ex Roemer & Schultes var. gronovii — common dodder, swamp dpdder, strangleweed, love-vine — 16 images
Cuscuta pentagona Engelm. — five-angled dodder — 19 images
Cydonia oblonga P.Miller — common quince — 2 images
Cynanchum louiseae Kartesz & Gandhi — black swallowwort — 22 images
Cynanchum rossicum (Kleopov) Borhidi — pale swallowwort — 14 images
Cynanchum vincetoxicum (L.) Pers. — white swallowwort — 5 images
Cynoglossum officinale L. — hound's tongue — 5 images
Cyperus bipartitus Torrey — shining flatsedge — 12 images
Cyperus dentatus Torrey — pondshore flatsedge — 27 images
Cyperus diandrus Torrey — red-edged flatsedge — 13 images
Cyperus engelmannii Steudel — Engelmann's flatsedge — 13 images
Cyperus erythrorhizos Muhl. — redroot flatsedge — 8 images
Cyperus esculentus L. — yellow flatsedge — 14 images
Cyperus filicinus Vahl — fern flatsedge — 5 images
Cyperus grayi Torrey — Gray's flatsedge — 32 images
Cyperus lupulinus ssp. macilentus (Fern.) Marcks — sand flatsedge — 15 images
Cyperus microiria Steudel — golden flatsedge — 10 images
Cyperus polystachyos Rottb. — Texas flatsedge — 7 images
Cyperus strigosus L. — straw-colored flatsedge — 40 images
Cypripedium acaule Aiton — pink lady's slipper — 17 images
Cystopteris bulbifera (L.) Bernh. — bulblet bladder fern — 10 images
Cystopteris fragilis (L.) Bernh. — brittle bladder fern, fragile fern — 10 images
Cystopteris tenuis (Michaux) Desv. — upland brittle bladder fern, MacKay's fragile fern, MacKay's brittle fern — 5 images
Cytisus scoparius (L.) Link var. scoparius — Scotch broom — 20 images
Dactylis glomerata L. — orchard grass — 7 images
Dalibarda repens L. — dewdrop — 15 images
Danthonia compressa Austin ex Peck — trail oatgrass, woodland oatgrass — 25 images
Danthonia spicata (L.) Beauv. ex Roemer & J.A. Schultes — wild oatgrass, poverty grass — 10 images
Daphne mezereum L. — February daphne, mezereon, mezereum — 4 images
Datura stramonium L. — jimsonweed, Jamestown weed — 42 images
Daucus carota L. — queen Anne's lace, wild carrot — 16 images
Decodon verticillatus (L.) Ell. — swamp loosestrife, waterwillow — 51 images
Delosperma cooperi (Hook.f.) L.Bolus — Cooper's hardy iceplant, trailing iceplant — 17 images
Dennstaedtia punctilobula (Michaux) T.Moore — hayscented fern — 59 images
Deparia acrostichoides (Swartz) M.Kato — silvery spleenwort — 20 images
Deschampsia flexuosa (L.) Trin. — common hairgrass — 15 images
Desmodium canadense (L.) DC. — showy ticktrefoil, Canadian ticktrefoil — 22 images
Desmodium ciliare (Muhl. ex Willd.) DC. — hairy small-leaved ticktrefoil — 11 images
Desmodium glutinosum (Muhl. ex Willd.) H.Ohashi & R.R.Mill — cluster-leaved ticktrefoil, pointed-leaf ticktrefoil — 7 images
Desmodium marilandicum (L.) DC. — Maryland or smooth small-leaved ticktrefoil — 25 images
Desmodium nudiflorum (L.) H.Ohashi & R.R.Mill — naked ticktrefoil, naked-flower ticktrefoil — 7 images
Desmodium paniculatum (L.) DC. — panicled ticktrefoil — 11 images
Desmodium perplexum Schubert — perplexing ticktrefoil, Dillen's ticktrefoil, puzzling ticktrefoil — 3 images
Desmodium rotundifolium DC. — prostrate ticktrefoil, round-leaved trailing ticktrefoil — 10 images
Desmodium ×humifusum (Muhl. ex Bigelow) Beck — spreading ticktrefoil — 3 images
Deutzia gracilis Sieb. & Zucc. — slender deutzia — 4 images
Deutzia scabra Thunb. — fuzzy deutzia — 26 images
Dianthus armeria L. — Debtford pink — 13 images
Dianthus barbatus L. — sweet William — 8 images
Dianthus deltoides L. — maiden pink — 4 images
Dicentra canadensis (Goldie) Walp. — squirrel corn — 14 images
Dicentra cucullaria (L.) Bernh. — Dutchman's breeches — 6 images
Dicentra eximia (Ker Gawl.) Torrey — fringed bleeding heart, eastern bleeding heart, Appalachian bleeding heart, turkey corn — 2 images
Dicentra formosa (Andr.) Walp. — western bleeding heart, Pacific bleeding heart — 2 images
Dicentra spectabilis (L.) Raf. — common bleeding heart — 2 images
Dichanthelium acuminatum (Sw.) Gould & Clark ssp. acuminatum — auburn panic grass, tapered rosette grass — 7 images
Dichanthelium acuminatum var. fasciculatum (Torrey) Freckmann & Lelong — fascicled panic grass — 19 images
Dichanthelium acuminatum var. implicatum (Scribn.) Freckmann & Lelong — pondshore panic grass — 8 images
Dichanthelium clandestinum (L.) Gould — deertongue — 19 images
Dichanthelium columbianum (Scribner) Freckmann & Lelong — downy panic grass — 8 images
Dichanthelium commutatum (G.Pearson ex Ashe) Freckmann & Lelong — changeable panic grass — 6 images
Dichanthelium depauperatum (Muhl.) Gould — starved panic grass, slender panic grass — 3 images
Dichanthelium dichotomum (L.) Gould ssp. dichotomum — forked panic grass — 11 images
Dichanthelium latifolium (L.) Gould & Glark — broad-leaved panic grass — 26 images
Dichanthelium linearifolium (Scribner) Gould — linear-leaved panic grass — 11 images
Dichanthelium oligosanthes var. scribnerianum (Nash) Freckmann & Lelong — Scribner's panic grass — 9 images
Dichanthelium sphaerocarpon (Ell.) Gould — round-fruited panic grass — 10 images
Dichanthelium spretum (J.A.Schultes) Freckmann & Lelong — smooth panic grass — 4 images
Dichanthelium wrightianum (Scribner) Freckmann — Wright's panic grass — 2 images
Diervilla lonicera P.Miller — northern bush honeysuckle — 20 images
Diervilla rivularis Gattinger — hairy bush honeysuckle — 9 images
Digitalis lanata Ehrh. — woolly foxglove, Grecian foxglove — 2 images
Digitalis lutea L. — straw foxglove, small yellow foxglove — 5 images
Digitalis purpurea L. var. purpurea — common foxglove, purple foxglove — 30 images
Digitaria ischaemum (Schreber) Schreber ex Muhl. — smooth crabgrass — 9 images
Digitaria sanguinalis (L.) Scop. — large crabgrass — 30 images
Digitaria violascens Link — violet crabgrass — 15 images
Diodia teres Walter — buttonweed — 18 images
Diphasiastrum digitatum (Dill. ex A.Br.) Holub — southern groundcedar — 26 images
Diphasiastrum tristachyum (Pursh) Holub — slender groundcedar, wiry groundcedar — 6 images
Dipsacus fullonum L. — common teasel — 3 images
Dipsacus laciniatus L. — cutleaf teasel — 19 images
Dirca palustris L. — leatherwood — 9 images
Distichlis spicata (L.) Greene — saltgrass, saltmarsh spikegrass — 16 images
Doronicum pardalianches L. — great leopard's bane — 18 images
Draba verna L. — spring whitlow-grass, longpod whitlow-grass — 43 images
Drosera filiformis Raf. var. filiformis — threadleaf sundew — 42 images
Drosera intermedia Hayne — spoonleaf sundew, spatulate-leaved sundew — 22 images
Drosera rotundifolia L. — roundleaf sundew — 28 images
Drosera ×eloisiana T.S.Bailey — hybrid sundew — 14 images
Dryopteris campyloptera (Kunze) Clarkson — mountain wood fern — 1 images
Dryopteris carthusiana (Vill.) H.P.Fuchs — spinulose wood fern — 39 images
Dryopteris clintoniana (D.C.Eaton ex A.Gray) Dowell — Clinton's wood fern — 6 images
Dryopteris cristata (L.) A.Gray — crested wood fern — 34 images
Dryopteris intermedia (Muhl. ex Willd.) A.Gray — intermediate wood fern — 40 images
Dryopteris marginalis (L.) A.Gray — marginal wood fern — 50 images
Dryopteris ×boottii (Tuckerman) Underw. — Boott's wood fern — 14 images
Dryopteris ×slossoniae Wherry ex Lellinger — Slosson's wood fern — 11 images
Duchesnea indica (Andr.) Focke — Indian strawberry — 16 images
Dulichium arundinaceum (L.) Britton — threeway sedge — 21 images
Echinacea purpurea (L.) Moench — purple coneflower — 12 images
Echinochloa crus-galli (L.) Beauv. — barnyard grass — 22 images
Echinochloa frumentacea Link — Japanese millet — 18 images
Echinochloa muricata (Beauv.) Fern. var. muricata — cockspur grass, barnyard grass — 3 images
Echinochloa muricata var. microstachya Wieg. — small-spiked cockspur — 6 images
Echinochloa walterii (Pursh) Heller — Walter's cockspur — 14 images
Echinocystis lobata (Michaux) Torrey & A.Gray — wild cucumber, prickly cucumber — 13 images
Echinops sphaerocephalus L. — great globethistle, pale globethistle — 8 images
Echium creticum L. — Cretian viper's bugloss — 13 images
Echium vulgare L. — common viper's bugloss, blue weed — 3 images
Eclipta prostrata (L.) L. — false daisy, Yerba de Tajo — 7 images
Egeria densa Planchon — Brazilian waterweed, Brazilian elodea — 4 images
Eichhornia crassipes (Mart.) Solms-Laubach — water hyacinth — 1 images
Elaeagnus angustifolia L. — Russian olive, oleaster, silverberry — 13 images
Elaeagnus umbellata (Royle) Schneid. — autumn olive, oleaster — 54 images
Elatine minima (Nutt.) Fischer & C.A.Meyer — lesser waterwort — 37 images
Eleocharis acicularis (L.) Roemer & Schultes — needle spikerush — 37 images
Eleocharis elliptica Kunth — orange-fruited spikerush — 21 images
Eleocharis flavescens var. olivacea (Torrey) Gleason — olive spikerush — 29 images
Eleocharis melanocarpa Torrey — black-fruited spikerush — 46 images
Eleocharis obtusa (Willd.) J.A.Schultes var. obtusa — soft-stemmed spikerush — 54 images
Eleocharis obtusa var. ellipsoidalis Fern. — soft-stemmed spikerush — 10 images
Eleocharis obtusa var. jejuna Fern. — soft-stemmed spikerush — 2 images
Eleocharis palustris (L.) Roemer & Schultes — marsh spikerush — 20 images
Eleocharis parvula (Roemer & Schultes) Link ex Bluff, Nees & Schauer — dwarf spikerush — 7 images
Eleocharis robbinsii Oakes — Robbins' spikerush — 62 images
Eleocharis rostellata (Torrey) Torrey — saltmarsh spikerush, beaked spikerush — 20 images
Eleocharis tenuis (Willd.) Schultes var. tenuis — slender spikerush — 17 images
Eleocharis tuberculosa (Michaux) Roemer & Schultes — tubercled spikerush — 15 images
Eleocharis uniglumis (Link) Schultes — saline spikerush, one-glumed spikerush — 21 images
Eleusine indica (L.) Gaertner — goosegrass, yard grass — 16 images
Eleutherococcus pentaphyllus (Sieb. & Zucc.) Nakai — five-leaved aralia — 8 images
Elodea canadensis Michaux — northern waterweed — 11 images
Elodea nuttallii (Planchon) H.St.John — Nuttall's waterweed — 10 images
Elymus canadensis L. — Canada wild rye — 5 images
Elymus trachycaulus ssp. glaucus (Pease & Moore) Cody — slender wheatgrass — 3 images
Elymus virginicus L. var. virginicus — Virginia wild rye — 17 images
Elymus virginicus var. halophilus (Bicknell) Wieg. — saltmarsh wild rye — 18 images
Elytrigia pungens (Vahl) Palla var. pungens — seabeach quackgrass — 2 images
Elytrigia repens (L.) Gould — couchgrass, quackgrass — 6 images
Epifagus virginiana (L.) W.P.C.Barton — beechdrops — 30 images
Epigaea repens L. — trailing arbutus, mayflower — 50 images
Epilobium ciliatum Raf. — glandular willowherb, American willowherb — 33 images
Epilobium coloratum Biehler — eastern willowherb, purple-leaved willowherb, cinnamon willowherb — 3 images
Epilobium leptophyllum Raf. — narrow-leaved willowherb — 4 images
Epilobium palustre L. — marsh willowherb — 3 images
Epilobium strictum Muhl. ex Spreng. — downy willowherb, northeastern willowherb — 5 images
Epimedium ×rubrum C.Morren — red barrenwort, red bishop's hat — 6 images
Epipactis helleborine (L.) Crantz — helleborine — 31 images
Equisetum arvense L. — field horsetail, common horsetail — 34 images
Equisetum fluviatile L. — river horsetail — 23 images
Equisetum hyemale ssp. affine (Engelm.) Calder & Taylor — American scouring rush — 23 images
Equisetum pratense Ehrh. — meadow horsetail — 3 images
Equisetum sylvaticum L. — woodland horsetail — 3 images
Equisetum variegatum Schleicher ex Weber & Mohr ssp. variegatum — variegated scouring rush — 5 images
Equisetum ×litorale Kühl. ex Rupr. — shore horsetail — 7 images
Eragrostis capillaris (L.) Nees — lace lovegrass, lace grass — 4 images
Eragrostis cilianensis (All.) Lut. ex Janchen — stink grass, stinking lovegrass — 12 images
Eragrostis curvula (Schrader) Nees — weeping lovegrass — 16 images
Eragrostis pectinacea (Michaux) Nees — tufted lovegrass — 24 images
Eragrostis pilosa (L.) Beauv. var. pilosa — Indian lovegrass, soft lovegrass — 16 images
Eragrostis spectabilis (Pursh) Steudel — purple lovegrass — 18 images
Erechtites hieraciifolius (L.) Raf. ex DC. — fireweed, pilewort — 31 images
Erigeron annuus (L.) Pers. — eastern daisy fleabane — 15 images
Erigeron philadelphicus L. — Philadelphia fleabane — 4 images
Erigeron pulchellus Michaux — robin's plantain fleabane — 11 images
Erigeron strigosus L. — rough fleabane — 14 images
Eriocaulon aquaticum (Hill) Druce — pipewort, white buttons — 44 images
Eriocaulon parkeri Robinson — Parker's pipewort — 8 images
Eriophorum tenellum Nutt. — rough cottongrass — 2 images
Eriophorum virginicum L. — Virginia cottongrass, tawny cottongrass — 36 images
Erodium cicutarium (L.) L'Hér. ex Aiton ssp. cicutarium — redstem storksbill, redstem filaree, alfileria — 6 images
Eryngium planum L. — broad-leaved eryngo — 6 images
Eryngium yuccifolium Michx. — button eryngo — 4 images
Erysimum cheiranthoides L. — wormseed mustard — 15 images
Erysimum ×marshalli (Henfr.) Bois. — wallflower (garden hybrid, parentage uncertain) — 4 images
Erythronium americanum Ker Gawler ssp. americanum — trout lily — 41 images
Euonymus alatus (Thunb.) Sieb. — winged spindletree, burning bush — 37 images
Euonymus europaeus L. — European spindletree — 25 images
Euonymus fortunei (Turcz.) Hand.-Maz. — winter creeper — 27 images
Euonymus sachalinensis (Fr.Schmidt) Maxim. — Sakhalin spindletree — 14 images
Euonymus sieboldianus Blume — Siebold's euonymus — 7 images
Eupatorium dubium (Willd. ex Poir.) E.E.Lamont — Atlantic Joe-Pye-weed — 30 images
Eupatorium fistulosum (Barratt) E.E.Lamont — hollow-stemmed Joe-Pye-weed — 30 images
Eupatorium hyssopifolium L. — hyssop-leaved boneset — 23 images
Eupatorium maculatum (L.) E.E.Lamont var. maculatum — spotted Joe-Pye-weed — 9 images
Eupatorium novae-angliae (Fern.) V.Sullivan ex A.Haines & Sorrie — New England boneset, pondshore boneset — 8 images
Eupatorium perfoliatum L. — boneset, thoroughwort — 49 images
Eupatorium pilosum Walter — rough boneset, verbena boneset — 36 images
Eupatorium purpureum (L.) E.E.Lamont var. purpureum — sweet Joe-Pye-weed — 13 images
Eupatorium sessilifolium L. — upland boneset — 5 images
Euphorbia cyparissias L. — cypress spurge — 22 images
Euphorbia esula L. — leafy spurge — 13 images
Euphorbia lathyris L. — caper spurge — 3 images
Euphorbia maculata L. — spotted spurge, milk purslane — 21 images
Euphorbia polygonifolia L. — seaside spurge — 17 images
Euthamia caroliniana (L.) Greene ex Port. & Britt. — coastal plain slender goldenrod, slender-leaved flat-topped goldenrod — 26 images
Euthamia graminifolia (L.) Nutt. — common flat-topped goldenrod, grassleaf flat-topped goldenrod — 16 images
Fagopyrum esculentum Moench — buckwheat — 12 images
Fagus grandifolia Ehrh. — American beech — 75 images
Fagus sylvatica L. — European beech — 24 images
Festuca arundinacea (Schreb.) Dumort. — tall fescue, tall ryegrass — 10 images
Festuca filiformis Pourret — hair fescue — 9 images
Festuca ovina L. — sheep fescue — 1 images
Festuca pratensis (Hudson) Beauv. — meadow fescue, meadow ryegrass — 5 images
Festuca rubra L. — red fescue — 2 images
Festuca trachyphylla (Hack.) Krajina — hard fescue — 17 images
Fimbristylis autumnalis (L.) Roemer & Schultes — northern fimbry, autumn fimbry — 24 images
Foeniculum vulgare P.Miller — common fennel — 4 images
Forsythia intermedia Zabel — border forsythia — 22 images
Forsythia suspensa (Thunb.) Vahl — weeping forsythia, golden bell — 7 images
Forsythia viridissima Lindl. — greenstem forsythia, Korean forsythia — 9 images
Fragaria vesca L. ssp. vesca — European strawberry — 3 images
Fragaria vesca ssp. americana (Porter) Staudt — woodland strawberry — 9 images
Fragaria virginiana Duchesne ssp. virginiana — thick-leaved wild strawberry — 24 images
Fragaria ×ananasa Duchesne — garden strawberry — 3 images
Frankenia sp. — seaheath — 5 images
Fraxinus americana L. — white ash — 69 images
Fraxinus excelsior L. — common European ash — 6 images
Fraxinus nigra Marshall — black ash — 21 images
Fraxinus pennsylvanica Marshall — green ash — 57 images
Froelichia gracilis (Hooker) Moq. — slender cottonweed — 25 images
Fuirena pumila (Torrey) Sprengel — annual umbrella sedge, dwarf umbrella sedge — 32 images
Fumaria officinalis L. ssp. officinalis — common fumitory, medicinal fumitory, earth smoke — 5 images
Gaillardia ×grandiflora hort. — hybrid blanket flower (G. aristata × G. pulchella) — 3 images
Galanthus elwesii Hook.f. — greater snowdrop — 8 images
Galanthus nivalis L. ssp. nivalis — snowdrop — 8 images
Galanthus woronowii Losinsk. — green snowdrop, Woronow's snowdrop — 8 images
Galax urceolata (Poiret) Brummitt — galax, beetleweed, wandflower — 17 images
Galeopsis bifida Boenn. — cleft hempnettle — 13 images
Galinsoga parviflora Cav. — quickweed, gallant soldiers — 2 images
Galinsoga quadriradiata Ruiz & Pavón — hairy quickweed — 13 images
Galium aparine L. — cleavers — 12 images
Galium asprellum L. — rough bedstraw — 6 images
Galium brevipes Fern. & Wiegand — short-stalked bedstraw — 4 images
Galium circaezans Michaux var. circaezans — wild licorice, forest bedstraw — 20 images
Galium divaricatum Pourret ex Lam. — Lamarck's bedstraw, Mediterranean bedstraw — 5 images
Galium lanceolatum Torrey — wild licorice, lanceleaf bedstraw — 9 images
Galium mollugo L. — white bedstraw, field madder — 27 images
Galium obtusum Bigelow ssp. obtusum — blunt-leaved marsh bedstraw, large marsh bedstraw — 4 images
Galium odoratum (L.) Scop. — sweet white woodruff — 11 images
Galium palustre L. — common marsh bedstraw — 4 images
Galium pilosum Aiton — hairy bedstraw — 29 images
Galium tinctorium (L.) Scop. var. tinctorium — stiff marsh bedstraw, stiff three-petaled bedstraw — 35 images
Galium trifidum L. ssp. trifidum — northern three-lobed bedstraw, tricleft bedstraw — 3 images
Galium triflorum Michaux — woodland bedstraw, sweet-scented bedstraw — 16 images
Galium verum L. ssp. verum — yellow bedstraw — 6 images
Gaultheria hispidula (L.) Muhl. ex Bigelow — creeping snowberry — 16 images
Gaultheria procumbens L. — wintergreen, checkerberry, eastern teaberry — 48 images
Gaylussacia baccata (Wangenh.) K.Koch — black huckleberry — 55 images
Gaylussacia dumosa var. bigelowiana (Fern.) Sorrie & Weakley — bog huckleberry — 25 images
Gaylussacia frondosa (L.) Torr. & A.Gray ex Torr. — blue huckleberry, dangleberry — 43 images
Genista tinctoria L. — dyer's greenweed — 3 images
Gentiana andrewsii Griseb. — Andrews' bottle gentian — 26 images
Gentianopsis crinita (Froel.) Y.C.Ma — fringed gentian — 11 images
Geranium carolinianum L. — Carolina cranesbill, Carolina geranium — 31 images
Geranium maculatum L. — spotted cranesbill, wild geranium, wood geranium — 26 images
Geranium pratense L. — meadow cranesbill, meadow geranium — 2 images
Geranium robertianum L. — herb-Robert, Robert's geranium — 23 images
Geranium sanguineum L. — bloody cranesbill, bloody gearanium — 14 images
Geranium thunbergii Sieb. & Zucc. ex Lindl. & Paxton — Japanese cranesbill, dewdrop cranesbill, Thunberg's geranium — 13 images
Geum canadense Jacq. var. canadense — white avens — 48 images
Geum fragarioides (Michaux) Smedmark — barren strawberry — 4 images
Geum laciniatum Murray — rough avens, floodplain avens, herb-bennet avens — 7 images
Geum rivale L. — purple avens — 8 images
Geum urbanum L. — city avens — 9 images
Geum virginianum L. — cream-colored avens, Virginia avens — 1 images
Glaucium flavum Crantz — yellow hornpoppy, sea poppy — 18 images
Glaux maritima (L.) Galasso, Banfi & Soldano — sea milkwort — 9 images
Glechoma hederacea L. — ground ivy, gill-over-the-ground — 21 images
Gleditsia triacanthos L. — honey locust — 19 images
Glyceria acutiflora Torrey — sharp-scaled mannagrass — 10 images
Glyceria canadensis (Michaux) Trin. — rattlesnake mannagrass, rattlesnake grass — 13 images
Glyceria grandis S.Watson — tall mannagrass — 2 images
Glyceria obtusa (Muhl.) Trin. — coastal mannagrass — 19 images
Glyceria septentrionalis A.S.Hitchc. — eastern floatgrass — 13 images
Glyceria striata (Lam.) A.S.Hitchc. — fowlmeadow grass, fowl mannagrass — 12 images
Gnaphalium obtusifolium (L.) Hilliard & Burtt — sweet everlasting, fragrant cudweed — 27 images
Gnaphalium uliginosum L. — low cudweed — 9 images
Goodyera pubescens (Willd.) R.Br. — downy rattlesnake plantain — 18 images
Goodyera tesselata Lodd. — checkered rattlesnake plantain — 18 images
Gratiola aurea Pursh — golden hedgehyssop, golden pert — 40 images
Gratiola aurea forma leucantha Bartlett — white-flowered golden hedgehyssop — 24 images
Gymnocarpium dryopteris (L.) Newman — oak fern — 5 images
Gypsophila elegans Bieb. — annual baby's breath, showy baby's breath — 2 images
Halesia carolina L. — Carolina silverbell — 8 images
Hamamelis vernalis Sarg. — Ozark witch-hazel, spring witch-hazel — 15 images
Hamamelis virginiana L. — American witch-hazel, common witch-hazel — 47 images
Hedeoma pulegioides (L.) Pers. — American pennyroyal — 7 images
Hedera colchica K.Koch — Caucasian ivy — 5 images
Hedera helix L. — English ivy, European ivy — 22 images
Hedera hibernica (G.Kirchn.) Bean — Atlantic ivy — 19 images
Helenium flexuosum Raf. — winged sneezeweed, purple-headed sneezeweed — 24 images
Helianthemum bicknellii (Fern.) Barnh. — hoary rockrose — 30 images
Helianthemum canadense (L.) Britton — longbranch frostweed, Canadian frostweed — 52 images
Helianthemum dumosum Bicknell — bushy rockrose — 26 images
Helianthemum propinquum (Bicknell) Bicknell — low frostweed, low rockrose — 32 images
Helianthus annuus L. — common sunflower, mirasol — 5 images
Helianthus cf. strumosus L. — harsh sunflower — 10 images
Helianthus decapetalus L. — thin-leaved sunflower — 4 images
Helianthus divaricatus L. — woodland sunflower, rough sunflower, rough woodland sunflower — 18 images
Helianthus giganteus L. — tall sunflower, giant sunflower — 5 images
Helianthus tuberosus L. — Jerusalem artichoke — 23 images
Heliopsis helianthoides (Dunal) Fern. — false sunflower — 18 images
Hemerocallis fulva (L.) L. — orange daylily — 30 images
Hemerocallis lilioasphodelus L. — yellow daylily — 1 images
Hepatica nobilis var. acuta (DC.) G.Lawson — sharp-lobed liverleaf, sharp-lobed liverwort — 4 images
Hepatica nobilis var. obtusa (DC.) H.Hara — blunt-lobed liverleaf, blunt-lobed liverwort — 28 images
Heracleum maximum Bartram — cow parsnip — 42 images
Heracleum sosnowskyi Manden. — Sosnowsky's giant hogweed — 5 images
Hesperis matronalis L. — dame's rocket, dame's violet, Damask violet — 24 images
Hexastylis arifolia (Michaux) Small — little brown jug — 7 images
Hexastylis shuttleworthii (Britten & Baker f.) Small — largeflower heartleaf — 22 images
Hibiscus moscheutos L. ssp. moscheutos — swamp mallow, rose mallow — 27 images
Hibiscus syriacus L. — Korean hibiscus — 6 images
Hieracium aurantiacum L. — orange hawkweed — 10 images
Hieracium flagellare Willd. — whip hawkweed — 6 images
Hieracium gronovii L. — Gronovius' hawkweed — 25 images
Hieracium kalmii L. — Canada hawkweed — 5 images
Hieracium lachenalii K.C.Gmelin — European common hawkweed — 7 images
Hieracium paniculatum L. — woodland hawkweed, panicled hawkweed — 15 images
Hieracium pilosella L. — mouse-ear hawkweed — 8 images
Hieracium piloselloides Vill. — smooth hawkweed — 21 images
Hieracium pratense Tausch — king-devil, meadow hawkweed — 9 images
Hieracium sabaudum L. — Savoy hawkweed — 31 images
Hieracium scabrum Michaux — rough hawkweed — 28 images
Hieracium venosum L. — rattlesnake weed — 13 images
Hierochloe odorata (Weber) Y.Schouten & Veldkamp ssp. nitens — Indian sweetgrass, sweet grass — 11 images
Holcus lanatus L. — velvet grass — 26 images
Holosteum umbellatum L. ssp. umbellatum — jagged chickweed — 20 images
Honckenya peploides ssp. robusta (Fern.) Hultén — seabeach sandwort — 25 images
Hordeum murinum ssp. leporinum (Link) Arcangeli — wild barley — 7 images
Hordeum vulgare L. — common barley — 3 images
Hosta lancifolia Tratt. — narrowleaf plantain lily — 3 images
Hosta ventricosa (Salisb.) Stearn — blue plantain lily — 6 images
Hottonia inflata Ell. — featherfoil — 28 images
Houstonia caerulea L. — bluets — 32 images
Houstonia longifolia Gaertn. — long-leaved bluet — 17 images
Hudsonia ericoides L. — pinebarren golden heather — 45 images
Hudsonia tomentosa Nutt. — woolly beach heather — 34 images
Humulus japonicus Sieb. & Zucc. — Japanese hop — 5 images
Humulus lupulus L. var. lupulus — common European hop — 4 images
Huperzia lucidula (Michaux) Trev. — shining firmoss, shining clubmoss — 13 images
Hyacinthoides non-scripta (L.) Chouard — English bluebell — 5 images
Hyacinthoides ×variabilis P.D.Sell — hybrid bluebell — 12 images
Hydrangea anomala D.Don — climbing hydrangea — 7 images
Hydrangea arborescens L. — smooth hydrangea, sevenbark — 3 images
Hydrangea paniculata Sieb. — peegee hydrangea — 6 images
Hydrangea quercifolia W.Bartram — oakleaf hydrangea — 3 images
Hydrocotyle americana L. — swamp pennywort, woodland pennywort — 19 images
Hydrocotyle umbellata L. — pondshore pennywort, water pennywort — 27 images
Hydrocotyle verticillata Thunb. — saltpond pennywort — 3 images
Hydrophyllum virginianum L. — Virginia waterleaf — 11 images
Hypericum boreale (Britt.) Bickn. — northern St. John's-wort — 11 images
Hypericum boreale f. callitrichoides Fassett — northern St. John's-wort submersed form — 9 images
Hypericum canadense L. — Canadian St. John's-wort — 14 images
Hypericum ellipticum Hooker — pale St. John's-wort — 2 images
Hypericum gentianoides (L.) B.S.P. — orangegrass, pineweed — 25 images
Hypericum majus (A.Gray) Britton — larger Canadian St. John's-wort — 3 images
Hypericum mutilum L. — dwarf St. John's-wort — 3 images
Hypericum perforatum L. — common Eurasian St. John's-wort — 22 images
Hypericum prolificum L. — shrubby St. John's-wort — 4 images
Hypericum punctatum Lam. — spotted St. John's-wort — 16 images
Hypochaeris radicata L. — hairy cat's-ear, spotted cat's ear — 44 images
Hypoxis hirsuta (L.) Cov. — yellow stargrass — 22 images
Hyssopus officinalis L. — European hyssop, medicinal hyssop — 3 images
Hystrix patula L. — bottlebrush grass — 16 images
Iberis sempervirens L. — evergreen candytuft — 4 images
Ilex aquifolium × I. rugosa — Meserve holly — 8 images
Ilex crenata Thunb. — Japanese holly — 13 images
Ilex glabra (L.) A.Gray — inkberry, inkberry holly — 34 images
Ilex laevigata (Pursh) A.Gray — smooth winterberry — 19 images
Ilex montana Torrey & A.Gray ex A.Gray — bigleaf holly, mountain holly — 31 images
Ilex opaca Ait. — American holly — 62 images
Ilex verticillata (L.) A.Gray — common winterberry — 55 images
Impatiens capensis Meerb. — jewelweed — 28 images
Ionactis linariifolia (L.) Greene — stiff aster, spruce aster — 35 images
Ipomoea purpurea (L.) Roth — purple morning glory, common morning glory — 9 images
Iris cristata Aiton — crested dwarf iris — 1 images
Iris prismatica Pursh — slender blueflag — 30 images
Iris pseudacorus L. — yellow iris — 27 images
Iris sibirica L. — Siberian iris — 12 images
Iris versicolor L. — northern blueflag — 43 images
Isoetes acadiensis Kott — Acadian quillwort — 6 images
Isoetes sp. — quillwort (either E. engelmannii or E. ×foveolata) — 10 images
Isoetes tuckermanii A.Br. ex Engelm. — Tuckerman's quillwort — 20 images
Isotria verticillata (Willd.) Raf. — large whorled pogonia — 11 images
Itea virginica L. — Virginia sweetspire, Virginia willow — 4 images
Iva frutescens ssp. oraria L. — hightide bush, saltmarsh elder, maritime marsh elder, bigleaf marsh elder — 23 images
Jasione montana L. — sheep's bit — 43 images
Jasminum nudiflorum Lindl. — winter jasmine — 1 images
Juglans ailanthifolia Carr. — Japanese walnut — 4 images
Juglans cinerea L. — butternut — 10 images
Juglans nigra L. — black walnut — 15 images
Juncus acuminatus Michaux — sharp-fruited rush — 8 images
Juncus anthelatus (Wieg.) R.E.Brooks — Wiegand's rush — 8 images
Juncus articulatus L. — jointed rush — 7 images
Juncus balticus (Willd.) Trautv. — brackish rush — 3 images
Juncus bufonius L. — toad rush — 5 images
Juncus canadensis J.Gay ex Laharpe — marsh rush, Canada rush — 32 images
Juncus dichotomus Ell. — forked rush — 6 images
Juncus effusus L. ssp. effusus — soft rush — 5 images
Juncus effusus ssp. solutus (Fern. & Wieg.) Hämet-Ahti — lax soft rush — 13 images
Juncus gerardii Loisel — saltmarsh rush — 22 images
Juncus greenei Oakes & Tuckerman — Greene's rush — 17 images
Juncus marginatus Rostk. — grassleaf rush — 12 images
Juncus militaris Bigelow — bayonet rush — 55 images
Juncus pelocarpus E.Meyer — pondshore rush — 30 images
Juncus pylaei Laharpe — Pylaie's soft rush — 21 images
Juncus secundus Beauv. ex Poiret — lopsided rush — 5 images
Juncus subcaudatus (Engelm.) Coville — woodland rush — 5 images
Juncus tenuis Willd. — path rush, yard rush — 20 images
Juniperus communis var. depressa Pursh — common juniper, pasture juniper — 37 images
Juniperus conferta Parl. — shore juniper — 29 images
Juniperus horizontalis Moench — prostrate or creeping juniper — 9 images
Juniperus virginiana (Fern. & Griscom) A.E.Murray — eastern red cedar — 71 images
Kalmia angustifolia L. — sheep laurel — 49 images
Kalmia latifolia L. — mountain laurel — 63 images
Kalmia polifolia Wangenh. — bog laurel — 5 images
Kalopanax septemlobus Koidzumi — castor aralia — 11 images
Kerria japonica (L.) DC. — Japanese rose — 4 images
Kochia scoparia (L.) Schrader — summer cypress — 18 images
Koelreuteria paniculata Laxm. — golden rain tree — 12 images
Kolkwitzia amabilis Graebner — beautybush — 8 images
Krigia virginica (L.) Willd. — dwarf dandelion — 39 images
Lachnanthes caroliniana (Lam.) Dandy — redroot — 18 images
Lactuca biennis (Moench) Fern. — blue wild lettuce — 12 images
Lactuca canadensis L. — yellow wild lettuce — 50 images
Lactuca serriola L. — prickly lettuce — 32 images
Lamium amplexicaule L. var. amplexicaule — common henbit, henbit deadnettle — 9 images
Lamium argentatum (Smejkal) Henker ex G.H.Loos — variegated yellow archangel — 33 images
Lamium galeobdolon (L.) L. ssp. galeobdolon — yellow henbit, yellow archangel — 1 images
Lamium maculatum L. — spotted deadnettle — 3 images
Lamium purpureum L. var. purpureum — purple deadnettle, red deadnettle — 22 images
Laportea canadensis (L.) Weddell — wood nettle — 9 images
Lapsana communis L. — nipplewort — 23 images
Larix decidua P.Miller — European larch — 18 images
Larix laricina (DuRoi) K.Koch — tamarack, American larch — 15 images
Lathyrus japonicus var. maritimus (L.) Kartesz & Gandhi — beach pea — 16 images
Lathyrus latifolius L. — perennial pea, broad-leaved everlasting pea, broad-leaved sweet pea — 2 images
Lathyrus sylvestris L. — flat pea, narrow-leaved everlasting pea — 13 images
Lechea intermedia Leggett ex Britt. var. intermedia — largepod pinweed — 28 images
Lechea maritima Leggett ex B.S.P. var. maritima — beach pinweed — 77 images
Lechea minor L. — thymeleaf pinweed — 26 images
Lechea mucronata Raf. — hairy pinweed — 59 images
Lechea pulchella var. pulchella Raf. var. pulchella — Leggett's pinweed — 4 images
Lechea tenuifolia Michaux — slender pinweed — 18 images
Leersia oryzoides (L.) Sw. — rice cutgrass — 42 images
Leersia virginica Willd. — white cutgrass — 9 images
Lemna minor L. — common duckweed — 7 images
Lemna valdiviana Phil. — pale duckweed, Valdivia duckweed — 4 images
Leontodon autumnalis (L.) Moensch ssp. autumnalis — fall dandelion, hawkbit — 27 images
Leonurus cardiaca L. — motherwort — 23 images
Lepidium campestre (L.) Aiton f. — field cress, cow cress — 26 images
Lepidium densiflorum Schrader var. densiflorum — common pepperweed — 2 images
Lepidium latifolium L. — broad-leaved pepperweed, tall pepperweed, broad-leaved peppergrass — 18 images
Lepidium ruderale L. — narrow-leaved peppergrass, stinking peppergrass — 4 images
Lepidium virginicum L. var. virginicum — Virginia pepperweed, poor-man's pepper — 28 images
Lespedeza angustifolia (Pursh) Ell. — narrow-leaved bushclover — 9 images
Lespedeza capitata Michx. — round-headed bushclover — 17 images
Lespedeza cuneata (Dum.-Cours.) G.Don — Chinese bushclover, sericea lespedeza — 16 images
Lespedeza frutescens (L.) Hornem. — violet bushclover — 4 images
Lespedeza hirta (L.) Hornem. — hairy bushclover — 13 images
Lespedeza procumbens Michaux — trailing bushclover — 12 images
Lespedeza sp. — bushclover — 4 images
Lespedeza stuevei Nutt. — Stueve's bushclover — 20 images
Lespedeza thunbergii ssp. formosa (Nakai) H.Ohashi — tall bushclover, Thunberg's bushclover, shrub lespedeza — 26 images
Lespedeza violacea (L.) Pers. — wand bushclover — 17 images
Lespedeza virginica (L.) Britton — slender bushclover — 13 images
Lespedeza ×longifolia DC. — hybrid bushclover — 3 images
Leucanthemum vulgare Lam. — oxeye daisy — 28 images
Leucojum aestivum L. — summer snowflake — 3 images
Leucothoe fontanesiana (Steudel) Sleumer — doghobble, drooping fetterbush — 15 images
Leucothoe racemosa (L.) Nutt. — swamp sweetbells — 54 images
Leucothoe recurva (Buckley) Britton — mountain fetterbush — 15 images
Liatris novae-angliae (Lunell) Shinners — New England blazing star — 36 images
Liatris spicata L. — dense blazing star, marsh blazing star — 8 images
Ligusticum scothicum L. — sea lovage, Scotch lovage — 4 images
Ligustrum obtusifolium Sieb. & Zucc. var. obtusifolium — Japanese privet, ibota privet — 22 images
Ligustrum ovalifolium Hassk. — California privet — 16 images
Ligustrum sinense Lour. — Chinese privet — 5 images
Ligustrum vulgare L. — European common privet — 13 images
Lilaeopsis chinensis (L.) Kuntze — eastern grasswort — 2 images
Lilium canadense L. — Canada lily, wild yellow lily — 19 images
Lilium lancifolium Thunb. — tiger lily — 6 images
Lilium philadelphicum L. — wood lily — 50 images
Lilium sp. — unknown hybrid — 2 images
Lilium superbum L. — Turk's cap lily — 4 images
Limonium carolinianum (Walt.) Britt. — sea lavender — 43 images
Linaria vulgaris P. Miller — yellow toadflax, common Eurasian toadflax, butter-and-eggs — 16 images
Lindera benzoin (L.) Blume — spicebush — 64 images
Lindernia dubia var. anagallidea (Michaux) Cooperrider — false pimpernel — 27 images
Lindernia dubia var. dubia (L.) Pennell var. dubia — false pimpernel — 3 images
Linnaea borealis (Forbes) Hultén ex Clausen — twinflower — 9 images
Linum intercursum Bicknell — sandplain flax — 16 images
Linum medium var. texanum (Planchon) Fern. — Texan flax, stiff yelow flax — 7 images
Linum perenne L. — perennial flax, blue flax — 9 images
Linum usitatissimum L. — European common flax — 3 images
Linum virginianum L. — Virginia yellow flax, woodland yellow flax — 26 images
Lipocarpha micrantha (Vahl) G.C.Tucker — dwarf bulrush — 27 images
Liquidambar styraciflua L. — sweetgum — 17 images
Liriodendron tulipifera L. — tuliptree — 34 images
Liriope graminifolia (L.) Baker — lilyturf — 6 images
Lobelia cardinalis L. — cardinalflower — 30 images
Lobelia dortmanna L. — water lobelia — 28 images
Lobelia erinus L. — edging lobelia, garden lobelia, trailing lobelia — 6 images
Lobelia inflata L. — Indian tobacco — 30 images
Lobelia siphilitica L. — great blue lobelia — 15 images
Lobelia spicata Lam. — pale spiked lobelia, spiked lobelia — 1 images
Lobularia maritima (L.) Desv. — sweet alyssum — 4 images
Lolium multiflorum Lam. — Italian ryegrass — 4 images
Lolium perenne L. — perennial ryegrass — 28 images
Lonicera canadensis Bartram ex Marsh. — fly honeysuckle — 4 images
Lonicera dioica L. — wild honeysuckle — 4 images
Lonicera japonica Thunb. — Japanese honeysuckle — 38 images
Lonicera maackii (Rupr.) Maxim. — Amur honeysuckle — 35 images
Lonicera morrowii A.Gray — Morrow's honeysuckle — 53 images
Lonicera periclymenum L. — woodbine, European common honeysuckle — 3 images
Lonicera sempervirens L. — trumpet honeysuckle — 11 images
Lonicera tatarica L. — Tatarian honeysuckle — 3 images
Lonicera ×bella Zabel — hybrid honeysuckle, whitebell honeysuckle — 35 images
Lotus corniculatus L. — birdfoot trefoil — 10 images
Ludwigia alternifolia L. — seedbox, squarepod — 31 images
Ludwigia palustris (L.) Elliott — water purslane, mud loosestrife — 26 images
Ludwigia sphaerocarpa Elliott — round-fruited seedbox — 15 images
Lunaria annua L. — annual honesty — 12 images
Lupinus perennis L. — wild lupine — 23 images
Lupinus polyphyllus Lindley var. polyphyllus — garden lupine, Washington lupine — 17 images
Luzula bulbosa (Wood) Rydb. — bulbous woodrush — 2 images
Luzula campestris (L.) DC. — field woodrush — 6 images
Luzula echinata (Small) Hermann — hedgehog woodrush — 3 images
Luzula multiflora (Retz.) Lej. — common woodrush — 37 images
Lychnis coronaria (L.) Murray — mullein pink — 11 images
Lychnis flos-cuculi L. ssp. flos-cuculi — ragged robin — 9 images
Lycopodiella appressa (Chapman) Cranfill — southern bog clubmoss — 21 images
Lycopodiella inundata (L.) Holub — northern bog clubmoss — 12 images
Lycopodiella ×gilmanii A.Haines — Gilman's clubmoss, southern bog clubmoss × northern bog clubmoss — 6 images
Lycopodium annotinum (L.) A.Haines — stiff clubmoss — 9 images
Lycopodium clavatum L. — running clubmoss, common clubmoss — 13 images
Lycopodium dendroideum (Michaux) A.Haines — northern clubmoss, round-branched groundpine — 5 images
Lycopodium hickeyi (W.H.Wagner, Beitel & Moran) A.Haines — Hickey's clubmoss — 7 images
Lycopodium obscurum (L.) A.Haines — princess-pine, tree clubmoss — 23 images
Lycopus americanus Muhl. ex W.Barton — American bugleweed, American water horehound — 33 images
Lycopus amplectens Raf. — pondshore water horehound, sessile-leaved water horehound — 33 images
Lycopus europaeus L. — European water horehound — 1 images
Lycopus rubellus Moench — stalked water horehound, swamp water horehound — 29 images
Lycopus uniflorus Michaux — tuberous water horehound, northern water horehound — 54 images
Lycopus virginicus L. — Virginia water horehound, floodplain water horehound — 37 images
Lygodium palmatum (Bernh. ex Schrader) Sw. — American climbing fern — 22 images
Lyonia ligustrina (L.) DC. — maleberry — 62 images
Lysichiton camtschatcensis (L.) Schott — Asian skunk cabbage — 10 images
Lysimachia ciliata L. — fringed loosestrife — 14 images
Lysimachia clethroides Duby ex DC. — gooseneck loosestrife — 4 images
Lysimachia hybrida Michaux — narrow-leaved loosestrife — 11 images
Lysimachia nummularia L. — creeping jenny, moneywort — 12 images
Lysimachia quadrifolia L. — whorled loosestrife — 19 images
Lysimachia terrestris (L.) B.S.P. — swamp candles — 25 images
Lysimachia thyrsiflora L. — tufted loosestrife — 9 images
Lysimachia ×producta (A.Gray) Fern. — whorled loosestrife × swamp candles — 6 images
Lythrum salicaria L. — purple loosestrife — 39 images
Maclura pomifera (Raf.) Schneid. — osage orange — 23 images
Magnolia acuminata L. — cucumber tree, cucumbertree — 6 images
Magnolia macrophylla Michaux — bigleaf magnolia — 2 images
Magnolia tripetala L. — umbrella magnolia — 14 images
Magnolia virginiana L. — sweetbay magnolia — 13 images
Magnolia ×soulangeana Soul.-Bod. — saucer magnolia, Chinese magnolia — 8 images
Maianthemum canadense Desf. — Canada mayflower — 17 images
Malus baccata (L.) Borkh. — Siberian crabapple — 25 images
Malus floribunda Sieb. ex Van Houtte — Japanese flowering crabapple — 20 images
Malus prunifolia (Willd.) Borkh. — pear-leaved crabapple — 7 images
Malus pumila P.Miller — orchard apple, common apple — 10 images
Malus toringo (Siebold) Siebold ex de Vriese — Japanese crabapple, toringo crabapple, Siebold's crabapple — 17 images
Malva alcea L. — vervain mallow — 4 images
Malva moschata L. — musk mallow — 9 images
Malva neglecta Wallr. — common mallow, cheeses — 14 images
Marsilea quadrifolia L. — European water clover, four-leaf clover, pepperwort — 7 images
Matricaria chamomilla L. — German chamomile, Hungarian chamomile, scented mayweed — 5 images
Matricaria discoidea DC. — pineapple weed — 3 images
Matteuccia struthiopteris ssp. pensylvanica (Willd.) A.Löve & D.Löve — American ostrich fern — 28 images
Medeola virginiana L. — Indian cucumber-root, Indian cucumber — 37 images
Medicago lupulina L. — black medick — 5 images
Medicago sativa L. — lucerne, blue alfalfa — 5 images
Melampyrum lineare Desr. — cowwheat — 18 images
Melilotus albus Medicus — white sweetclover — 15 images
Melilotus officinalis (L.) Lam. — yellow sweetclover — 9 images
Melissa officinalis L. — lemon balm — 23 images
Menispermum canadense L. — moonseed — 3 images
Mentha arvensis (Becker) Briq. — field mint — 2 images
Mentha canadensis L. — American field mint — 11 images
Mentha spicata L. ssp. spicata — spearmint — 6 images
Mentha ×piperita L. — peppermint — 7 images
Mentha ×rotundifolia (L.) Hudson — round-leaved mint — 2 images
Mentha ×villosa Hudson — woolly mint — 13 images
Menyanthes trifoliata L. — bogbean, buckbean — 7 images
Mertensia virginica (L.) Pers. ex Link — Virginia cowslip, Virginia bluebells — 4 images
Metasequoia glyptostroboides Hu & W.C.Cheng — dawn redwood — 10 images
Microstegium vimineum (Trin.) A.Camus — Japanese stiltgrass — 29 images
Mikania scandens (L.) Willd. — climbing hempvine — 30 images
Mimulus ringens L. — long-stalked monkeyflower, square-stemmed monkeyflower, blue monkeyflower, Allegheny monkeyflower — 17 images
Mirabilis nyctaginea (Michaux) MacMillan — heartleaf four-o'clock, heartleaf umbrellawort — 13 images
Miscanthus sinensis Andersson — Chinese plumegrass — 39 images
Mitchella repens L. — partridgeberry — 21 images
Mitella diphylla L. — twoleaf miterwort, twoleaf mitrewort, coolwort, Bishop's cap — 8 images
Moehringia lateriflora (L.) Fenzl — grove sandwort — 15 images
Mollugo verticillata L. — carpetweed — 29 images
Monarda didyma L. — scarlet beebalm, rimson beebalm — 1 images
Monarda fistulosa L. ssp. fistulosa — wild bergamot — 16 images
Monarda media Willd. — purple bergamot — 2 images
Monotropa hypopitys Crantz — pinesap, false beechdrops — 17 images
Monotropa lanuginosa (Michx.) Nutt. — hairy pinesap — 18 images
Monotropa uniflora L. — Indian pipe — 30 images
Morus alba L. — white mulberry — 18 images
Muhlenbergia frondosa (Poir.) Fern. — wirestem muhly — 11 images
Muhlenbergia schreberi J.F.Gmelin — nimblewill — 6 images
Muhlenbergia sobolifera (Muhl. ex Willd.) Trin. — awnless woodland muhly — 9 images
Muhlenbergia uniflora (Muhl.) Fern. — pondshore muhly — 27 images
Muscari botryoides (L.) P.Miller — common grape hyacinth — 4 images
Muscari neglectum Guss. ex Ten. — Atlantic grape hyacinth — 13 images
Mycelis muralis (L.) Dumort. — wall lettuce — 8 images
Myosotis arvensis (L.) Hill — field forget-me-not, field scorpiongrass — 6 images
Myosotis discolor Pers. — yellow-and-blue forget-me-not, changing forget-me-not — 2 images
Myosotis scorpioides L. — true forget-me-not, water forget-me-not, scorpion weed — 12 images
Myosotis stricta Link ex Roemer & J.A.Schultes — blue scorpion grass — 27 images
Myosotis sylvatica Ehrh. ex Hoffm. — garden forget-me-not, wood forget-me-not, woodland forget-me-not — 11 images
Myosotis verna Nutt. — early scorpiongrass, spring forget-me-not, early forget-me-not — 10 images
Myosoton aquaticum (L.) Moensch — giant chickweed — 5 images
Myrica gale L. — sweet gale — 58 images
Myrica pensylvanica (Mirbel) Kartesz — bayberry — 36 images
Myriophyllum heterophyllum Michaux — variable watermilfoil — 12 images
Myriophyllum humile (Raf.) Morong — lowly watermilfoil — 47 images
Myriophyllum spicatum L. — Eurasian watermilfoil, spiked watermilfoil — 11 images
Myriophyllum tenellum Bigelow — leafless watermilfoil — 14 images
Najas flexilis (Willd.) Rostk. & Schmidt — common naiad — 16 images
Narcissus minor L. — small-flowered daffodil — 2 images
Narcissus poeticus L. — poet's daffodil — 3 images
Narcissus pseudonarcissus L. — wild daffodil, trumpet daffodil — 10 images
Narcissus spp. — cultivars — 6 images
Narcissus ×incomparabilis Mill. — incomparable daffodil — 4 images
Nasturtium microphyllum Boenn. ex Reichenb. — watercress — 6 images
Nasturtium officinale Ait.f. — watercress — 9 images
Nelumbo lutea Willd. — American lotus — 4 images
Nemopanthus mucronatus (L.) M.Powell, Savol., & S.Andrews — catberry, swamp holly, mountain holly — 70 images
Nepeta cataria L. — catnip — 2 images
Nipponanthemum nipponicum (Franch. ex Maxim.) Kitam. — Nippon daisy — 9 images
Nuphar variegata Durand ex Clinton — yellow waterlily, spatterdock — 44 images
Nuttallanthus canadensis (L.) D.A.Sutton — blue toadflax, old-field toadflax — 37 images
Nymphaea odorata Aiton ssp. odorata — American white waterlily, fragrant waterlily — 28 images
Nymphaea odorata ssp. tuberosa (Paine) Wiersema & Hellquist — tuberous waterlily — 14 images
Nymphoides cordata (Ell.) Fern. — floating heart — 26 images
Nymphoides peltata Gmelin (Kuntze) — yellow floating heart — 17 images
Nyssa sylvatica Marshall — tupelo, black gum — 108 images
Odontites vernus ssp. serotinus (Dumort.) Corb. — red bartsia — 9 images
Oenanthe javanica (Blume) DC. — Java waterdropwort, water dropwort, water celery — 10 images
Oenothera biennis L. — common evening primrose — 39 images
Oenothera oakesiana (A.Gray) J.W.Robbins ex S.Wats. & Coult. — Oakes' evening primrose, cross-shaped evening primrose — 20 images
Oenothera parviflora L. — small-flowered evening primrose — 9 images
Oenothera perennis L. — little evening primrose, little sundrops — 11 images
Oenothera pilosella Raf. ssp. pilosella — meadow evening primrose, hairy sundrops — 2 images
Onoclea sensibilis L. — sensitive fern — 36 images
Opuntia humifusa (Raf.) Raf. — devil's tongue, eastern prickly pear — 8 images
Origanum vulgare L. — oregano, sweet marjoram — 3 images
Ornithogalum umbellatum L. — star-of-Bethlehem — 25 images
Orobanche uniflora L. — one-flowered cancer-root, ghost pipe — 22 images
Orontium aquaticum L. — golden club — 3 images
Oryzopsis asperifolia Michaux — spreading ricegrass — 24 images
Oryzopsis pungens (Torrey ex Spreng.) Dorn — little ricegrass — 21 images
Osmorhiza claytoni (Michaux) C.B.Clarke — sweet cicely — 28 images
Osmorhiza longistylis (Torrey) DC. — aniseroot — 20 images
Osmunda cinnamomea (L.) C.Presl — cinnamon fern — 38 images
Osmunda claytoniana L. — interrupted fern — 37 images
Osmunda regalis ssp. spectabilis (Willd.) A.Löve & D.Löve — American royal fern — 44 images
Ostrya virginiana (P.Mill.) K.Koch — eastern hophornbeam — 42 images
Oxalis corniculata L. — creeping sorrel — 10 images
Oxalis dillenii Jacq. — showy yellow woodsorrel, southern yellow woodsorrel — 32 images
Oxalis florida Salisb. — smooth yellow woodsorrel — 6 images
Oxalis montana Raf. — mountain woodsorrel — 12 images
Oxalis stricta L. — common yellow woodsorrel — 25 images
Oxalis violacea L. — violet woodsorrel — 4 images
Oxydendrum arboreum (L.) DC. — sourwood — 7 images
Pachysandra procumbens Michx. — Allegheny spurge — 12 images
Pachysandra terminalis Sieb. & Zucc. — Japanese spurge — 10 images
Paeonia officinalis L. — garden peony, common peony — 2 images
Panax trifolius L. — dwarf ginseng — 25 images
Panicum amarum ssp. amarulum ssp. amarulum (A.S.Hitchc. & Chase) Freckmann & Lelong — bitter panic grass — 11 images
Panicum capillare L. ssp. capillare — witchgrass — 16 images
Panicum dichotomiflorum Michaux var. dichotomiflorum — fall panic grass — 38 images
Panicum philadelphicum Bernh. ex Trin. ssp. philadelphicum — Philadelphia panic grass — 11 images
Panicum rigidulum Bosc ex Nees ssp. rigidulum — flat-stemmed panic grass — 17 images
Panicum verrucosum Muhl. — warty panic grass — 24 images
Panicum virgatum L. — switchgrass — 41 images
Parietaria pensylvanica Muhl. ex Willd. — Pennsylvania pellitory, rock pellitory — 7 images
Paronychia canadensis (L.) A.Wood — forked chickweed — 11 images
Paronychia fastigiata (Raf.) Fern. var. fastigiata — hairy forked chickweed — 8 images
Parthenocissus inserta (Knerr) A.S.Hitchc. — thicket creeper, grape woodbine — 16 images
Parthenocissus quinquefolia (L.) Planchon — Virginia creeper — 55 images
Parthenocissus tricuspidata (Sieb. & Zucc.) Planchon — Japanese creeper, Japanese ivy, grape ivy, Boston ivy — 10 images
Paspalum setaceum Michaux var. setaceum — small-fruited beadgrass — 7 images
Paspalum setaceum var. muhlenbergii (Nash) D.Banks — Muhlenberg's beadgrass — 33 images
Paspalum setaceum var. psammophilum (Nash) D.Banks — sand beadgrass — 12 images
Pastinaca sativa L. — wild parsnip — 20 images
Paulownia tomentosa (Thunb.) Sieb. & Zucc. ex Steudel — princess tree, empress tree, or foxglove-tree — 10 images
Pedicularis canadensis L. ssp. canadensis — wood betony, Canadian lousewort, common lousewort — 15 images
Peltandra virginica (L.) Schott ex Schott & Endl. — green arrow arum, bog arum, tuckahoe — 28 images
Penstemon digitalis Nutt. ex Sims. — tall white beard-tongue — 14 images
Penthorum sedoides L. — ditch stonecrop — 15 images
Perovskia atriplicifolia Benth. — Russian sage — 12 images
Petasites hybridus (L.) Gaertner, B.Meyer & Scherb. — butterbur — 11 images
Petasites japonicus (Sieb. & Zucc.) Maxim. — great butterbur — 21 images
Petunia axillaris (Lam.) B.S.P. — garden petunia — 2 images
Petunia integrifolia (Hook.) Schinz & Thellung — violet-flowered petunia — 2 images
Peucedanum palustre (L.) Moensch — milk parsley — 11 images
Phalaris arundinacea L. — reed canarygrass — 41 images
Phaseolus vulgaris L. — green bean — 1 images
Phegopteris connectilis (Michaux) Watt — narrow beech fern, northern beech fern — 16 images
Phegopteris hexagonoptera (Michaux) Fée — broad beech fern, southern beech fern — 6 images
Phellodendron amurense Rupr. — Amur corktree — 41 images
Phellodendron chinense C.K.Schneider — Chinese corktree — 2 images
Phellodendron sachalinense (Fr.Schmidt) Sarg. — Sakhalin corktree — 20 images
Philadelphus coronarius L. — European mock-orange — 3 images
Philadelphus inodorus L. — Appalachian mock-orange — 1 images
Philadelphus pubescens Loisel. — hoary mock-orange, Ozark mock-orange — 4 images
Phleum pratense L. — timothy — 18 images
Phlox paniculata L. — fall phlox, garden phlox — 2 images
Phlox stolonifera Sims — creeping phlox — 2 images
Phlox subulata L. ssp. subulata — moss phlox — 5 images
Photinia villosa (Thunb.) DC. — Oriental photinia, Christmas berry — 3 images
Phragmites altissimus (Benth.) Mabille — giant reed — 17 images
Phragmites australis (Cav.) Trin. ex Steudel ssp. australis — common reed — 64 images
Phragmites australis ssp. americanus Saltonstall, P.M.Peterson & Soreng — North American reed — 16 images
Phragmites sp. — reed — 17 images
Phyllostachys aureosulcata McClure — yellow-grooved bamboo — 9 images
Phyllostachys dulcis McClure — sweetshoot bamboo — 5 images
Physalis alkekengi L. — Chinese lantern plant — 6 images
Physalis grisea (Waterfall) M.Martinez — downy groundcherry, strawberry-tomato — 5 images
Physalis heterophylla Nees var. heterophylla — clammy groundcherry — 16 images
Physalis longifolia var. subglabrata (Mackenzie & Bush) Cronq. — long-leaved groundcherry — 15 images
Physalis philadelphica Waterfall — tomatillo, Mexican groundcherry — 9 images
Physalis pubescens L. var. integrifolia (Dunal) Waterfall — low hairy groundcherry — 11 images
Physocarpus opulifolius (L.) Maxim. — ninebark — 3 images
Physostegia virginiana (L.) Bentham ssp. virginiana — false dragonhead — 4 images
Phytolacca americana L. var. americana — American pokeweed, poke sallet — 21 images
Picea abies (L.) H.Karst. — Norway spruce — 54 images
Picea glauca (Moench) Voss — white spruce — 32 images
Picea mariana (P.Miller) B.S.P. — black spruce — 32 images
Picea pungens Engelm. — blue pruce — 12 images
Picea rubens Sarg. — red spruce — 19 images
Picris hieracioides L. — hawkweed oxtongue — 2 images
Pieris floribunda (Pursh) Benth. & Hook. — fetterbush, mountain andromeda — 39 images
Pieris japonica (Thunb.) D.Don ex G.Don — Japanese andromeda — 20 images
Pilea pumila (L.) A.Gray — clearweed, richweed — 17 images
Pinus banksiana Lamb. — Jack pine — 12 images
Pinus mugo Turra — mugo pine, Swiss mountain pine — 3 images
Pinus nigra Arnott — Austrian pine — 12 images
Pinus resinosa Ait. — red pine — 23 images
Pinus rigida P.Miller — pitch pine — 132 images
Pinus strobus L. — white pine — 89 images
Pinus sylvestris L. — Scotch pine, Scots pine — 25 images
Pinus thunbergii Parl. — Japanese black pine — 23 images
Piptochaetium avenaceum (L.) Parodi — black oatgrass — 24 images
Pistia stratiotes L. — water lettuce — 3 images
Pisum sativum L. — garden pea — 1 images
Pityopsis falcata (Pursh) Nutt. — sickle-leaved golden aster — 37 images
Plantago aristata Michaux — bracted plantain — 18 images
Plantago intermedia DC. — saltmarsh plantain — 17 images
Plantago lanceolata L. — narrow-leaved plantain, English plantain, ribgrass plantain — 22 images
Plantago major L. — common plantain, white man's foot — 20 images
Plantago maritima var. juncoides (Lam.) A.Gray — seaside plantain — 27 images
Plantago rugelii Dcne. — American plantain, Rugel's plantain, blackseed plantain — 18 images
Platanthera aquilonis Sheviak — north wind bog orchid, northern green orchid — 3 images
Platanthera blephariglottis (Willd.) Lindley — white fringed orchid — 14 images
Platanthera clavellata (Michaux) Luer — green woodland orchid — 17 images
Platanthera grandiflora (Bigelow) Lindley — large purple fringed orchid — 6 images
Platanthera lacera (Michx.) G.Don — ragged fringed orchid — 9 images
Platanus occidentalis L. — western plane, American planetree, sycamore — 56 images
Pluchea odorata var. succulenta (Fern.) Cronq. — saltmarsh fleabane — 22 images
Poa annua L. — annual bluegrass — 15 images
Poa bulbosa (Koel.) Arcang. — bulbous bluegrass — 16 images
Poa chapmaniana Scribner — Chapman's bluegrass — 4 images
Poa compressa L. — flat-stemmed bluegrass, Canada bluegrass — 14 images
Poa nemoralis L. — woodland bluegrass — 5 images
Poa palustris L. — fowlmeadow grass — 6 images
Poa pratensis ssp. angustifolia (L.) Arcang. — June grass, narrow-leaved Kentucky bluegrass — 8 images
Poa trivialis L. — rough bluegrass — 5 images
Podophyllum peltatum L. — mayapple, wild mandrake — 11 images
Pogonia ophioglossoides (L.) Ker Gawler — rose pogonia — 17 images
Polemonium caeruleum L. — blue Jacob's ladder — 1 images
Polemonium reptans L. var. reptans — Greek valerian — 4 images
Polygala cruciata (Fern. & Schub.) A.Haines — northern cross-leaved milkwort — 27 images
Polygala nuttallii Torrey & A.Gray — Nuttall's milkwort — 17 images
Polygala paucifolia Willd. — fringed polygala, flowering wintergreen — 14 images
Polygala polygama Walter — racemed milkwort, bitter milkwort — 27 images
Polygala sanguinea L. — purple milkwort, common milkwort — 17 images
Polygala verticillata L. — whorled milkwort — 14 images
Polygonatum biflorum (Walter) Ell. — giant Solomon's seal — 4 images
Polygonatum latifolium (Jacq.) Desf. — broad-leaved Solomon's seal — 5 images
Polygonatum pubescens (Willd.) Pursh — hairy Solomon's seal — 29 images
Polygonella articulata L. — jointweed — 36 images
Polygonum amphibium var. emersum (L.) S.F.Gray — erect water smartweed — 23 images
Polygonum amplexicaule Vahl — mountain fleece, red bistort — 10 images
Polygonum arifolium (L.) Haroldson — halberdleaf tearthumb — 18 images
Polygonum aviculare L. — doorweed — 26 images
Polygonum careyi (Olney) Greene — Carey's smartweed — 39 images
Polygonum cilinode (Michaux) Holub — fringed bindweed — 1 images
Polygonum convolvulus (L.) A.Löve — false buckwheat, black bindweed — 3 images
Polygonum cristatum (Engelm. & A.Gray) Holub — winged bindweed — 10 images
Polygonum cuspidatum (Houtt.) R.Decr. — Japanese knotweed — 37 images
Polygonum cuspidatum var. compactum (Hook.f.) J.P.Bailey — dwarf Japanese knotweed — 5 images
Polygonum glaucum Nutt. — seaside knotweed — 10 images
Polygonum hydropiper (L.) Opiz — water pepper — 6 images
Polygonum hydropiperoides (Michaux) Small — false water pepper, mild water pepper — 28 images
Polygonum lapathifolium (L.) S.F.Gray — nodding smartweed, willowweed smartweed, dockweed smartweed, pale smartweed — 5 images
Polygonum longisetum (Bruijn) Kitagawa — Chinese smartweed, Oriental lady's thumb, bristly lady's thumb — 20 images
Polygonum pensylvanicum (L.) G.Maza — pinkweed, smartweed, Pennsylvania smartweed — 35 images
Polygonum perfoliatum (L.) H.Gross — mile-a-minute — 39 images
Polygonum persicaria S.F.Gray — lady's thumb, spotted lady's thumb — 28 images
Polygonum polystachyum Greuter & Burdet — Himalayan knotweed, garden smartweed — 14 images
Polygonum punctatum (Ell.) Small — dotted smartweed, perennial water smartweed — 24 images
Polygonum puritanorum (Fern.) Soják — pondshore smartweed — 18 images
Polygonum ramosissimum (Small) Costea & Tardif — saltmarsh knotweed — 13 images
Polygonum robustius (Small) Bicknell — big water smartweed, coarse smartweed — 14 images
Polygonum sachalinense (F.S.Petrop. ex Maxim.) R.Decr. — giant knotweed — 11 images
Polygonum sagittatum (L.) H.Gross — arrowleaf tearthumb — 16 images
Polygonum scandens (L.) Holub — climbing false buckwheat, bindweed — 26 images
Polygonum tenue Michaux — rock knotweed — 12 images
Polygonum virginiana (L.) Gaertner — jumpseed — 24 images
Polygonum ×bohemica (Chrtek & Chrtková) J.P.Bailey — Bohemian knotweed — 37 images
Polypodium appalachianum Haufler & Windham — Appalachian rock polypody — 19 images
Polypodium virginianum L. — rockcap fern, common rock polypody — 39 images
Polystichum acrostichoides (Michaux) Schott — Christmas fern — 31 images
Pontederia cordata L. — pickerelweed — 41 images
Populus alba L. — white poplar — 16 images
Populus balsamifera L. — balsam poplar — 5 images
Populus deltoides Bartram ex Marsh. — eastern cottonwood — 29 images
Populus grandidentata Michaux — bigtooth aspen — 38 images
Populus heterophylla L. — swamp cottonwood — 4 images
Populus nigra L. — Lombardy poplar, black poplar — 13 images
Populus tremuloides Michaux — trembling aspen — 45 images
Populus ×jackii Sarg. — balm-of-Gilead — 1 images
Portulaca oleracea L. — common purslane — 20 images
Potamogeton amplifolius Tuckerman — bigleaf pondweed — 3 images
Potamogeton berchtoldii Fieber — Berchtold's pondweed, slender tiny pondweed — 11 images
Potamogeton bicupulatus Fernald — hair-like pondweed — 18 images
Potamogeton crispus L. — crispy pondweed, curly pondweed — 3 images
Potamogeton epihydrus Raf. — surface pondweed, ribbonleaf pondweed — 38 images
Potamogeton gramineus L. — grassleaf pondweed — 4 images
Potamogeton natans L. — floating pondweed — 6 images
Potamogeton nodosus Poiret — long-leaved pondweed — 4 images
Potamogeton oakesianus Robbins — Oakes' pondweed — 13 images
Potamogeton pulcher Tuckerman — spotted pondweed — 6 images
Potamogeton spirillus Tuckerman — northern snailseed pondweed — 4 images
Potentilla anglica Laicharding — English cinquefoil — 1 images
Potentilla argentea L. — silver cinquefoil — 32 images
Potentilla arguta (Pursh) Rydb. — tall cinquefoil, glandular cinquefoil — 6 images
Potentilla canadensis L. — dwarf cinquefoil — 23 images
Potentilla egedei var. groenlandica (Wormsk.) Rydberg — saltmarsh silverweed, Eged's silverweed — 11 images
Potentilla fruticosa ssp. floribunda Raf. — shrubby cinquefoil — 13 images
Potentilla norvegica L. — three-finger, strawberryweed — 19 images
Potentilla recta L. — sulphur cinquefoil, sulfur cinquefoil, rough-fruited cinquefoil — 14 images
Potentilla simplex Michaux — common cinquefoil, old field cinquefoil — 14 images
Prenanthes altissima (L.) Hooker — tall rattlesnake root, slender rattlesnake root — 20 images
Prenanthes serpentaria (Pursh) Hooker — lion's foot, lion's foot rattlesnake root — 11 images
Prenanthes trifoliolata Cass. — three-leaved rattlesnake root, gall-of-the-earth — 29 images
Primula ×polyantha Mill. — hybrid primrose — 4 images
Proserpinaca palustris L. — marsh mermaidweed, common mermaidweed — 16 images
Proserpinaca pectinata Lam. — cut-leaved mermaidweed, comb-leaved mermaidweed — 13 images
Prunella vulgaris ssp. lanceolata (W.Barton) Hultén — American heal-all, American self-heal — 7 images
Prunella vulgaris ssp. vulgaris L. ssp. vulgaris — Eurasian heal-all, common self-heal — 3 images
Prunus alleghaniensis Porter — Allegheny plum — 3 images
Prunus americana Marsh. — wild plum, American plum — 3 images
Prunus avium (L.) L. — sweet cherry — 20 images
Prunus cerasus L. — sour cherry — 3 images
Prunus depressa Pursh — sand cherry, sandbar cherry — 7 images
Prunus hortulana Bailey — wild goose plum — 2 images
Prunus incisa Thunb. — Fuji cherry — 10 images
Prunus mahaleb L. — mahaleb cherry — 3 images
Prunus maritima Marsh. var. maritima — beach plum — 62 images
Prunus nigra Aiton — Canada plum — 4 images
Prunus pensylvanica L.f. var. pensylvanica — pin cherry, fire cherry — 38 images
Prunus persica (L.) Batsch — peach — 28 images
Prunus serotina Ehrh. — black cherry — 82 images
Prunus serrulata Lindley — Japanese cherry — 8 images
Prunus susquehanae Willd. — sand cherry — 34 images
Prunus virginiana L. var. virginiana — chokecherry — 51 images
Prunus ×cistena (N.E.Hansen) Koehne — purpleleaf sand cherry — 1 images
Pseudotsuga menziesii (Mirbel) Franco — Douglas fir — 36 images
Ptelea trifoliata L. ssp. trifoliata var. trifoliata — common hoptree, stinking ash, wafer ash — 11 images
Pteridium aquilinum var. latiusculum (Desv.) L.Underw. ex A.Heller — bracken fern — 31 images
Pteridium aquilinum var. pseudocaudatum (Clute) A.Heller — pinebarrens bracken fern — 5 images
Ptilimnium capillaceum (Michaux) Raf. — Mock Bishop's weed — 14 images
Puccinellia maritima (Hudson) Parl. — seaside alkaligrass — 5 images
Pueraria montana var. lobata (Willd.) Maesen & S.Almeida — kudzu — 12 images
Pulmonaria officinalis L. — common lungwort — 5 images
Puschkinia scilloides Adams — striped squill — 14 images
Pycnanthemum incanum (L.) Michx. — hoary mountain mint — 5 images
Pycnanthemum muticum (Michaux) Pers. — short-toothed mountain mint — 31 images
Pycnanthemum tenuifolium Schrader — slender-leaved mountain mint — 21 images
Pycnanthemum verticillatum var. pilosum (Nutt.) Cooperrider — whorled mountain mint, hairy mountain mint — 4 images
Pycnanthemum virginianum (L.) Durand & B.D.Jackson — Virginia mountain mint — 6 images
Pyrola americana Sweet — round-leaved shinleaf, glossy shinleaf — 47 images
Pyrola asarifolia Michaux — pink shinleaf — 2 images
Pyrola chlorantha Sw. — green-flowered shinleaf — 12 images
Pyrola elliptica Nutt. — elliptic shinleaf, large-leaved shinleaf, waxflower shinleaf — 24 images
Pyrularia pubera Michaux — Buffalo nut, oil nut — 33 images
Pyrus calleryana Dcne. — Callery pear, Bradford pear — 14 images
Pyrus communis L. — common European pear — 27 images
Pyrus pyrifolia (Burm.) Nakai — Asian pear, Japanese pear, Chinese pear — 3 images
Quercus alba L. — white oak — 76 images
Quercus bicolor Willd. — swamp white oak — 63 images
Quercus cerris L. — Turkey oak — 24 images
Quercus coccinea Muenchh. — scarlet oak — 42 images
Quercus ilicifolia Wangenh. — scrub oak, bear oak — 94 images
Quercus montana Willd. — chestnut oak — 36 images
Quercus muehlenbergii Engelm. — yellow oak, chinquapin oak — 1 images
Quercus palustris Muenchh. — pin oak — 31 images
Quercus prinoides Willd. — dwarf chestnut oak — 65 images
Quercus robur L. — English oak — 20 images
Quercus rubra L. — northern red oak — 61 images
Quercus stellata Wangenh. — post oak — 12 images
Quercus velutina Lam. — black oak — 52 images
Quercus ×bebbiana C.K.Schneider — Bebb's oak — 4 images
Quercus ×faxonii Trel. — Faxon's oak — 2 images
Quercus ×saulii C.K.Schneider — Saul's oak — 13 images
Ranunculus abortivus L. — kidney-leaved buttercup, small-flowered crowfoot — 29 images
Ranunculus acris L. — tall buttercup — 18 images
Ranunculus allegheniensis Britton — Allegheny buttercup — 12 images
Ranunculus bulbosus L. — bulbous buttercup, bulbous crowfoot, St. Anthony's turnip — 34 images
Ranunculus fascicularis Muhl. ex Bigelow — early buttercup, early crowfoot — 9 images
Ranunculus ficaria L. — lesser celandine, pilewort — 24 images
Ranunculus flabellaris Raf. — yellow water buttercup, yellow water crowfoot — 4 images
Ranunculus micranthus Nutt. — small-flowered buttercup, small-flowered crowfoot — 8 images
Ranunculus recurvatus Poiret var. recurvatus — hooked buttercup, hooked crowfoot — 31 images
Ranunculus repens L. — creeping buttercup, creeping crowfoot — 28 images
Ranunculus sceleratus L. var. sceleratus — cursed buttercup, celery-leaved buttercup, cursed crowfoot, celery-leaved crowfoot — 7 images
Raphanus raphanistrum L. — wild radish — 27 images
Ratibida pinnata (Vent.) Barnh. — gray-headed prairie coneflower — 10 images
Rhamnus alnus 'Asplenifolia' 'Asplenifolia' — narrow-leaved cultivar of glossy buckthorn — 4 images
Rhamnus cathartica L. — common buckthorn — 39 images
Rhamnus frangula P.Miller — glossy buckthorn — 34 images
Rheum rhabarbarum L. — rhubarb — 4 images
Rhexia virginica L. — northern meadowbeauty, wingstem meadowpitchers — 57 images
Rhinanthus minor L. ssp. minor — Eurasian yellow rattle — 12 images
Rhododendron calendulaceum (Michx.) Torr. — flame azalea — 8 images
Rhododendron canadense (L.) Torrey — rhodora — 18 images
Rhododendron carolinianum Rehd. — Carolina rhododendron — 9 images
Rhododendron catawbiense Michaux — Catawba rhododendron — 19 images
Rhododendron kaempferi — Kaempfer's azalea, torch azalea — 3 images
Rhododendron maximum L. — great laurel, rosebay — 42 images
Rhododendron maximum × R. catawbiense — hybrid rhododendron — 3 images
Rhododendron periclymenoides (Michaux) Shinners — pink azalea — 8 images
Rhododendron prinophyllum (Small) Millais — early azalea — 17 images
Rhododendron vaseyi A.Gray — Vasey's azalea — 7 images
Rhododendron viscosum (L.) Torrey — swamp azalea — 42 images
Rhodotypos scandens (Thunb.) Makino — jetbead, white kerria — 25 images
Rhus aromatica Aiton — fragrant sumac — 10 images
Rhus copallina L. — flameleaf sumac, winged sumac — 36 images
Rhus glabra L. — smooth sumac — 16 images
Rhus typhina L. — staghorn sumac — 32 images
Rhynchospora alba (L.) Vahl — white beakrush — 30 images
Rhynchospora capitellata (Michx.) Vahl — brown beakrush — 36 images
Rhynchospora fusca (L.) Aiton f. — brown beaksedge, sooty beakrush — 8 images
Rhynchospora inundata (Oakes) Fern. — narrow-fruited beaksedge, inundated hornsedge — 15 images
Rhynchospora macrostachya Torrey ex A.Gray — big-headed hornsedge — 50 images
Rhynchospora nitens (Vahl) A.Gray — short-beaked baldsedge — 11 images
Rhynchospora scirpoides (Torrey) A.Gray — long-beaked baldsedge — 56 images
Rhynchospora torreyana A.Gray — Torrey's beaksedge — 8 images
Ribes americanum P.Miller — American black currant — 4 images
Ribes cynosbati L. — wild gooseberry — 7 images
Ribes hirtellum Michaux — swamp gooseberry — 16 images
Ribes rubrum L. — garden red currant — 17 images
Ribes uva-crispa var. sativum DC. — European gooseberry — 3 images
Robinia hispida L. var. hispida — bristly locust — 20 images
Robinia pseudoacacia L. — black locust — 39 images
Robinia viscosa Vent. var. viscosa — clammy locust — 8 images
Rorippa globosa (Turcz. ex Fischer & Meyer) Hayek — round-fruited yellowcress — 4 images
Rorippa palustris (Desv.) Rydb. — marsh yellowcress — 34 images
Rosa acicularis ssp. sayi (Schwein.) W.H.Lewis — northern prickly rose — 10 images
Rosa blanda Aiton — smooth rose — 8 images
Rosa canina L. — dog rose — 16 images
Rosa carolina L. ssp. carolina — Carolina rose, pasture rose — 12 images
Rosa chinensis × R. multiflora (Polyantha Group) — multiflora rose hybrid — 17 images
Rosa cinnamomea L. — cinnamon rose — 4 images
Rosa gallica L. — French rose — 11 images
Rosa glauca Pourret — redleaf rose — 9 images
Rosa luciae Franch. & Rochebr. ex Crépin — memorial rose — 20 images
Rosa micrantha Borrer ex J.E.Smith — small-flowered rose — 11 images
Rosa multiflora Thunb. ex Murray — multiflora rose — 39 images
Rosa multiflora var. cathayensis Rehder & E.H.Wilson — pink multiflora rose — 13 images
Rosa nitida Willd. — shiny rose, New England rose — 11 images
Rosa palustris Marsh. — swamp rose — 30 images
Rosa rubiginosa L. — sweetbrier — 9 images
Rosa rugosa Thunb. — Japanese rose, saltspray rose — 36 images
Rosa spinosissima L. — Scotch rose — 7 images
Rosa virginiana P.Miller — Virginia rose, low rose — 29 images
Rubus allegheniensis Porter — Allegheny blackberry, common blackberry — 34 images
Rubus arenicola Blanchard — New England sand blackberry — 10 images
Rubus argutus Link — serrate blackberry — 3 images
Rubus caesius L. — European forest blackberry, European dewberry — 9 images
Rubus enslenii Tratt. — southern dewberry — 4 images
Rubus flagellaris Willd. — northern dewberry — 32 images
Rubus hispidus L. — bristly dewberry — 45 images
Rubus idaeus L. ssp. idaeus — European raspberry — 4 images
Rubus idaeus ssp. strigosus (Michaux) Focke — wild red raspberry — 1 images
Rubus jaysmithii Bailey — Smith's blackberry — 20 images
Rubus laciniatus Willd. — cutleaf blackberry, evergreen blackberry — 23 images
Rubus occidentalis L. — black raspberry — 22 images
Rubus odoratus L. — purple-flowering raspberry, thimbleberry — 14 images
Rubus parviflorus L. — western thimbleberry — 3 images
Rubus pensilvanicus Poiret — highbush blackberry, Pennsylvania blackberry — 6 images
Rubus phoenicolasius Maxim. — wine raspberry, wineberry — 10 images
Rubus pubescens Raf. — swamp dewberry, dwarf raspberry — 15 images
Rubus recurvicaulis Blanchard — arching sand blackberry — 7 images
Rubus setosus Bigelow — bristly blackberry, bog blackberry — 7 images
Rudbeckia hirta var. pulcherrima Farw. — black-eyed Susan — 32 images
Rudbeckia laciniata L. var. laciniata — green-headed coneflower, tall coneflower — 5 images
Rudbeckia subtomentosa Pursh — sweet coneflower — 3 images
Rumex acetosella (Pourett ex Lapeyr.) Akeroyd — sheep sorrel, red sorrel — 25 images
Rumex britannica L. — great water dock — 25 images
Rumex crispus L. — curly dock — 27 images
Rumex obtusifolius L. — red-veined dock, bitter dock — 28 images
Rumex pallidus Bigelow — seabeach dock, white dock — 4 images
Rumex salicifolius (Danser) Rech.f. — willowleaf dock — 4 images
Rumex verticillatus L. — swamp dock, water dock — 18 images
Ruppia maritima L. — ditchgrass, widgeongrass — 21 images
Sabatia campanulata (L.) Torrey — slender rose gentian, slender marsh pink — 8 images
Sabatia kennedyana Fern. — Plymouth gentian — 65 images
Saccharum ravennae L. — Ravenna grass, elephant grass, hardy pampas grass, plume grass — 3 images
Sagina decumbens (Ell.) Torrey & A.Gray ssp. decumbens — trailing pearlwort — 5 images
Sagina procumbens L. — matted pearlwort, birdseye — 12 images
Sagina sp. — pearlwort — 3 images
Sagittaria engelmanniana J.G.Small — acid-water arrowhead, Engelmann's arrowhead — 29 images
Sagittaria filiformis J.G.Sm. — threadleaf arrowhead, riffle arrowhead — 2 images
Sagittaria graminea Michaux var. graminea — grassleaf arrowhead — 6 images
Sagittaria latifolia Willd. — common arrowhead, duck potato — 34 images
Sagittaria subulata (L.) Buch. — river arrowhead — 3 images
Sagittaria teres S.Watson — pondshore arrowhead, terete arrowhead — 60 images
Salicornia bigelovii Torrey — dwarf glasswort — 15 images
Salicornia depressa Standl. — annual glasswort, common glasswort — 27 images
Salicornia virginica Michaux — perennial glasswort — 46 images
Salix aegyptiaca L. — musk willow, Persian willow — 15 images
Salix alba L. — white willow — 13 images
Salix atrocinerea Brotero — rusty willow — 115 images
Salix atrocinerea x S. humilis — rusty willow x upland willow — 13 images
Salix atrocinerea × S. bebbiana — rusty willow × Bebb's willow — 20 images
Salix atrocinerea × S. discolor — rusty willow × American pussy willow — 8 images
Salix atrocinerea × S. occidentalis — rusty willow × dwarf upland willow — 5 images
Salix atrocinerea/cinerea complex — rusty and ash willow with hybrids — 26 images
Salix babylonica hybrids — Babylon willow hybrid complex — 18 images
Salix bebbiana Sarg. — Bebb's willow — 40 images
Salix candida Fluegge ex Willd. — hoary willow — 19 images
Salix cinerea L. — ash willow — 36 images
Salix discolor Muhl. — large pussy willow — 76 images
Salix elaeagnos Scop. — olive willow, rosemary willow — 3 images
Salix eriocephala Michaux — heartleaf willow — 59 images
Salix euxina Belyaeva — West Asian willow — 18 images
Salix exigua ssp. interior (Rowlee) Cronq. — sandbar willow — 17 images
Salix gracilistyla Miq. — rose-gold pussy willow — 6 images
Salix humilis Marsh. — prairie willow, upland willow — 86 images
Salix integra var. albo-marginata Thunb. 'Albo-Marginata' — variegated entireleaf willow — 2 images
Salix lucida Muhl. — shining willow — 22 images
Salix nigra Marsh. — black willow — 66 images
Salix occidentalis Walter — dwarf upland willow — 89 images
Salix pedicellaris Pursh — bog willow — 37 images
Salix pentandra x S. ×fragilis — hybrid willow — 25 images
Salix petiolaris J.E.Smith — slender willow, meadow willow — 44 images
Salix purpurea L. — basket willow — 17 images
Salix purpurea × S. viminalis — basket willow × common osier — 1 images
Salix sericea Marsh. — silky willow — 45 images
Salix serissima (Bailey) Fern. — autumn willow — 31 images
Salix viminalis L. — common osier — 2 images
Salix ×conifera Wangenh. (pro sp.) — pussy willow × upland willow — 9 images
Salix ×fragilis L. — brittle willow — 23 images
Salix ×jesupii Fern. — Jesup's willow (white willow × shining willow) — 18 images
Salix ×meyeriana Rostk. — Meyer's willow — 5 images
Salix ×smithiana Willd. — Smith's willow — 9 images
Salsola kali L. ssp. kali — prickly or seabeach saltwort — 30 images
Salsola kali ssp. tragus L. — windwitch, prickly Russian thistle — 2 images
Salvia nemorosa L. — woodland sage — 2 images
Salvia officinalis L. — medicinal sage — 2 images
Sambucus canadensis (L.) R.Bolli — American black elderberry, American black-berried elderberry — 28 images
Sambucus racemosa L. — red elderberry, red-berried elderberry — 11 images
Samolus valerandi (Raf.) Hultén — water pimpernel — 18 images
Sanguinaria canadensis L. — bloodroot — 22 images
Sanguisorba canadensis L. — Canadian burnet, American burnet — 5 images
Sanguisorba minor ssp. muricata Scop — garden burnet — 10 images
Sanicula canadensis L. var. canadensis — black snakeroot, Canada blacksnakeroot — 6 images
Sanicula marilandica L. — Maryland black snakeroot, Maryland sanicle — 21 images
Saponaria officinalis L. — bouncing bet, common soapwort, soapweed — 21 images
Sarracenia purpurea L. — purple pitcherplant — 38 images
Sassafras albidum (Nutt.) Nees — sassafras — 77 images
Saxifraga pensylvanica (L.) Haw. — swamp saxifrage — 13 images
Saxifraga virginiensis (Michaux) Small — early saxifrage — 25 images
Scheuchzeria palustris L. — podgrass — 21 images
Schizachyrium scoparium (Michaux) Nash var. scoparium — little bluestem — 25 images
Scilla siberica (Haw. ex Andr.) Speta — Siberian squill — 10 images
Scirpus acutus (Muhl. ex Bigel.) A. & D.Löve var. acutus — hard-stemmed bulrush — 6 images
Scirpus americanus (Pers.) Volk. ex Schinz & R.Keller — saltmarsh threesquare, Olney's threesquare — 9 images
Scirpus atrocinctus Fern. — black-girdled woolsedge, dusky woolgrass — 2 images
Scirpus atrovirens Willd. — dark green bulrush, dark green bulsedge — 4 images
Scirpus cyperinus (L.) Kunth — common bulrush, woolgrass — 33 images
Scirpus expansus Fern. — spreading bulrush — 4 images
Scirpus georgianus Harper — black bulrush, Georgia bulrush — 6 images
Scirpus hattorianus Makino — meadow bulrush — 12 images
Scirpus longii Fernald — Long's bulrush, Long's woolgrass — 6 images
Scirpus maritimus (A.Nels.) T.Koyama — seaside bulrush — 18 images
Scirpus microcarpus J. & K.Presl — red-stemmed bulrush — 2 images
Scirpus novae-angliae (Britton) S.G.Smith — long-spiked bulrush — 6 images
Scirpus pedicellatus Fern. — stalked bulrush, stalked woolgrass — 10 images
Scirpus pungens (Vahl) Palla var. pungens — common threesquare — 32 images
Scirpus robustus (Pursh) Soják — saltmarsh bulrush — 21 images
Scirpus smithii (A.Gray) Soják var. smithii — Smith's clubsedge — 11 images
Scirpus subterminalis (Torrey) Soják — water bulrush, floating bulrush — 29 images
Scirpus tabernaemontani (K.C.Gmelin) Palla — softstem bulrush — 20 images
Scirpus verecundus (Spreng.) Palla — woodland bulrush — 20 images
Scirpus ×peckii Britton — Peck's bulrush — 14 images
Scleranthus annuus L. — annual knawel — 14 images
Scleranthus perennis L. — perennial knawel — 5 images
Scleria pauciflora var. caroliniana (Willd.) Wood — papillose nutsedge — 23 images
Scleria reticularis Michaux — pondshore nutsedge — 39 images
Scrophularia lanceolata Pursh — American figwort — 20 images
Scrophularia marilandica L. — eastern figwort, Maryland figwort — 7 images
Scrophularia nodosa L. — wood figwort — 7 images
Scutellaria galericulata L. — marsh scullcap, common scullcap — 12 images
Scutellaria lateriflora L. — mad-dog skullcap, blue skullcap — 14 images
Secale cereale L. — rye — 4 images
Sedum acre L. — goldmoss stonecrop — 5 images
Sedum aizoon (L.) V.Grulich — aizoon stonecrop — 5 images
Sedum album L. — white stonecrop — 10 images
Sedum sarmentosum Bunge — running stonecrop — 6 images
Sedum telephium (L.) H.Ohba ssp. telephium — live-forever — 15 images
Selaginella apoda (L.) Spring — meadow spikemoss — 9 images
Selaginella rupestris (L.) Spring — rock spikemoss — 16 images
Senecio aureus (L.) A. & D.Löve — golden ragwort — 22 images
Senecio obovatus (Muhl. ex Willd.) W.A.Weber & A.Löve — broad-leaved ragwort — 12 images
Senecio paupercula (Michaux) W.A.Weber & A.Löve — balsam ragwort, balsam groundsel — 9 images
Senecio vulgaris L. — common groundsel — 14 images
Senna hebecarpa (Fern.) Irwin & Barneby — northern wild senna — 33 images
Sericocarpus asteroides (L.) B.S.P. — toothed white-topped aster — 26 images
Sericocarpus linifolius (L.) B.S.P. — narrow-leaved white-topped aster — 14 images
Setaria faberi Herrm. ex Rosen — giant foxtail, nodding foxtail — 21 images
Setaria parviflora (Poiret) Kerguelen — bristly foxtail — 4 images
Setaria pumila (Poir.) Roemer & J.A.Schultes ssp. pumila — yellow foxtail — 35 images
Setaria viridis (L.) Beauv. — green foxtail — 11 images
Shortia galacifolia Torr. & A.Gray — Oconee bells — 10 images
Sibbaldiopsis tridentata (Aiton) Rydb. — three-toothed cinquefoil — 14 images
Sicyos angulatus L. — one-seeded bur cucumber — 14 images
Silene antirrhina L. — sleepy catchfly — 11 images
Silene armeria L. — sweetwilliam catchfly — 26 images
Silene dichotoma Ehrh. — forked campion, forking catchfly — 9 images
Silene dioica (L.) Clairville — red campion — 1 images
Silene latifolia ssp. alba (P.Mill.) Greuter & Burdet — white campion, evening lychnis — 24 images
Silene vulgaris (Moench) Garcke — bladder campion — 7 images
Silphium perfoliatum L. — cup plant — 16 images
Sisymbrium altissimum L. — tumbling mustard — 9 images
Sisymbrium loeselii L. — Loesel's mustard — 5 images
Sisymbrium officinale (L.) Scop. — hedge mustard — 12 images
Sisyrinchium angustifolium P.Miller — stout blue-eyed grass — 27 images
Sisyrinchium atlanticum Bicknell — eastern blue-eyed grass — 4 images
Sisyrinchium fuscatum Bicknell — sandplain blue-eyed grass — 5 images
Sisyrinchium montanum var. crebrum Fern. — meadow blue-eyed grass — 10 images
Sium suave Walter — water parsnip — 19 images
Smilacina amplexicaulis (Nutt.) W.A.Weber — western false Solomon's seal — 2 images
Smilacina racemosa (L.) Link ssp. racemosum — false Solomon's seal — 19 images
Smilacina stellata (L.) Link — starry Solomon's seal — 30 images
Smilax glauca Walter — sawbrier, wild sarsaparilla — 30 images
Smilax herbacea L. — carrion flower — 24 images
Smilax rotundifolia L. — catbrier, bullbrier — 33 images
Solanum carolinense L. var. carolinense — horsenettle — 23 images
Solanum dulcamara L. var. dulcamara — climbing nightshade, bittersweet nightshade — 25 images
Solanum dulcamara var. villosissimum Desv. — hairy bittersweet nightshade, hairy deadly nightshade — 5 images
Solanum lycopersicon L. — tomato — 8 images
Solanum nigrum L. — European black nightshade — 4 images
Solanum physalifolium (Bitter) Edmonds — viscid nightshade, groundcherry nightshade, hoe nightshade — 3 images
Solanum ptychanthum Dun. — eastern black nightshade — 18 images
Solanum rostratum Dunal — horned nightshade, buffalobur nightshade, buffalobur — 11 images
Solanum sisymbriifolium Lam. — sticky nightshade — 3 images
Solidago aestivalis Bicknell — sphagnum goldenrod — 25 images
Solidago altissima L. ssp. altissima — tall goldenrod — 18 images
Solidago arguta Aiton var. arguta — sharp-leaved goldenrod, cutleaf goldenrod, Atlantic goldenrod — 10 images
Solidago bicolor L. — silverrod, white goldenrod — 27 images
Solidago caesia L. var. caesia — wreath goldenrod, bluestem goldenrod — 19 images
Solidago canadensis L. var. canadensis — Canada goldenrod — 13 images
Solidago flexicaulis L. — zigzag goldenrod — 9 images
Solidago gigantea Aiton — smooth goldenrod, late goldenrod — 22 images
Solidago juncea Aiton — early goldenrod — 20 images
Solidago latissimifolia P.Miller — Elliott's goldenrod — 28 images
Solidago nemoralis Ait. — gray goldenrod — 21 images
Solidago odora Aiton — licorice goldenrod, sweet goldenrod — 38 images
Solidago patula Muhl. ex Willd. ssp. patula — rough-leaved goldenrod — 4 images
Solidago patula ssp. strictula (Torrey & A.Gray) Semple — roundleaf goldenrod — 5 images
Solidago puberula Nutt. — downy goldenrod — 20 images
Solidago rugosa P.Miller var. rugosa — common rough-stemmed goldenrod, common wrinkle-leaved goldenrod — 29 images
Solidago rugosa ssp. aspera (Aiton) Fern. — southern rough-stemmed goldenrod, barrens goldenrod — 8 images
Solidago sempervirens L. — seaside goldenrod — 50 images
Solidago simplex Kunth var. simplex — sticky goldenrod — 2 images
Solidago speciosa Nutt. var. speciosa — showy goldenrod — 2 images
Solidago uliginosa Nutt. — swamp goldenrod — 16 images
Solidago ulmifolia Muhl. ex Willd. var. ulmifolia — elmleaf goldenrod — 30 images
Sonchus arvensis L. ssp. arvensis — field sowthistle, corn sowthistle — 8 images
Sonchus asper (L.) Hill — spiny-leaved sowthistle, spiny sowthistle — 14 images
Sonchus oleraceus L. — annual sowthistle — 16 images
Sorbaria arborea C.K.Schneid. — tree false spirea — 7 images
Sorbaria sorbifolia (L.) A.Braun — false spirea — 11 images
Sorbus alnifolia (Siebold & Zucc.) K.Koch — alder-leaved mountain ash, Korean mountain ash — 2 images
Sorbus americana Marsh. — American mountain ash — 7 images
Sorbus aucuparia L. — European mountain ash — 39 images
Sorghastrum nutans (L.) Nash — Indian grass — 22 images
Sparganium americanum Nutt. — common bur-reed, American bur-reed — 33 images
Sparganium emersum Rehmann — green-fruited bur-reed — 14 images
Sparganium eurycarpum Engelm. ex A.Gray — giant bur-reed — 10 images
Spartina alterniflora Loisel — saltwater cordgrass — 32 images
Spartina cynosuroides (L.) Roth — big cordgrass, salt reedgrass — 15 images
Spartina patens (Aiton) Muhl. — salthay, saltmeadow grass, cordgrass — 23 images
Spartina pectinata Link — freshwater cordgrass, prairie cordgrass — 41 images
Spergula arvensis L. — corn spurrey — 5 images
Spergula morisonii Boreau — Morison's spurrey — 33 images
Spergularia rubra (L.) J. & K.Presl — common sand spurrey, red sand spurrey — 13 images
Spergularia salina (L.) Griseb. — saltmarsh sand spurrey — 16 images
Spiraea alba var. latifolia (Aiton) Dippel — broad-leaved meadowsweet — 25 images
Spiraea betulifolia Pall. — birchleaf spirea, white meadowsweet — 5 images
Spiraea japonica var. fortunei (Planch.) Rehd. — Japanese spirea — 7 images
Spiraea prunifolia Sieb. & Zucc. — bridalwreath meadowsweet, double spiraea — 7 images
Spiraea thunbergii Sieb. — Thunberg's meadowsweet — 13 images
Spiraea tomentosa L. — steeplebush — 18 images
Spiranthes cernua (L.) L.C.Richard — nodding ladies' tresses — 20 images
Spiranthes lacera (Raf.) Raf. — northern slender ladies' tresses — 5 images
Spiranthes ochroleuca (Rydb.) Rydb. — yellow ladies' tresses — 6 images
Spiranthes tuberosa Raf. — little ladies' tresses — 10 images
Spirodela polyrhiza (L.) Schleiden — greater duckweed — 4 images
Sporobolus vaginiflorus (Torrey ex A.Gray) Wood var. vaginiflorus — poverty grass — 12 images
Stachys hispida Pursh — hispid hedgenettle, hairy hedgenettle — 15 images
Stachys hyssopifolia Michaux — hyssop-leaved hedgenettle, rough hedgenettle — 39 images
Stachys palustris L. — Eurasian marsh hedgenettle, clown's woundwort — 7 images
Staphylea trifolia L. — bladdernut — 4 images
Stellaria graminea L. — field stitchwort, common stitchwort — 29 images
Stellaria longifolia Muhl. ex Willd. var. longifolia — long-leaved starwort — 6 images
Stellaria media (L.) Vill. — common chickweed — 30 images
Stewartia pseudocamellia Maxim. — Japanese stewartia — 3 images
Streptopus roseus (Aiton) Reveal — rose twisted-stalk, sessile-leaf twisted-stalk, rose mandarin, rosybells — 21 images
Strophostyles helvola (L.) Ell. — annual sand bean, trailing fuzzy bean — 23 images
Stuckenia pectinata (L.) Boerner — sago false pondweed, sago pondweed — 2 images
Stylophorum diphyllum (Michx.) Nutt. — celandine poppy — 14 images
Styphnolobium japonicum (L.) Schott. — Japanese pagoda tree, Chinese scholar tree — 1 images
Styrax japonicus Siebold & Zucc. — Japanese snowbell — 9 images
Suaeda calceoliformis (Hooker) Moq. — American sea blite — 8 images
Suaeda linearis (Ell.) Moq. — erect sea blite, slender sea blite — 9 images
Suaeda maritima (L.) Dumort. ssp. maritima — saltmarsh sea blite — 25 images
Suaeda richii (Fern.) Bassett & Crompton — Rich's sea blite — 4 images
Symphoricarpos albus ssp. laevigatus (Fern.) Hultén — western snowberry — 6 images
Symphoricarpos orbiculatus Moench — coralberry — 6 images
Symphytum asperum Lepechin — prickly comfrey — 4 images
Symphytum officinale L. — common comfrey — 4 images
Symplocarpus foetidus (L.) Salisb. ex Nutt. — skunk cabbage — 43 images
Symplocos paniculata (Thunb.) Miq. — Asiatic sweetleaf, sapphireberry — 8 images
Syringa reticulata (Blume) Hara — Amur tree lilac — 4 images
Syringa vulgaris L. — common lilac — 7 images
Tagetes erecta L. — Aztec marigold — 1 images
Tanacetum parthenium (L.) Sch. Bip. — feverfew — 7 images
Tanacetum vulgare L. — common tansy — 16 images
Taraxacum laevigatum (Willd.) DC. — red-seeded dandelion — 7 images
Taraxacum latilobum DC. — broad-lobed dandelion — 4 images
Taraxacum officinale G.H.Weber ex Wiggers — common dandelion — 28 images
Taxus baccata L. — English yew — 6 images
Taxus canadensis Marsh. var. canadensis — Canada yew — 25 images
Taxus cuspidata Sieb. & Zucc. — Japanese yew — 11 images
Teesdalia nudicaulis (L.) Ait.f. — common shepherd's cress — 43 images
Tephrosia virginiana (L.) Pers. — goat's rue, rabbit pea — 21 images
Teucrium canadense L. var. canadense — American germander, saltmarsh germander — 22 images
Thalictrum dioicum L. — early meadowrue — 18 images
Thalictrum pubescens Pursh — tall meadowrue — 27 images
Thalictrum revolutum DC. — waxy-leaved meadowrue, skunk meadowrue — 26 images
Thalictrum thalictroides (L.) Eames & Boivin — rue anemone — 9 images
Thelypteris noveboracensis (L.) Ching — New York fern — 22 images
Thelypteris palustris ssp. pubescens (Lawson) Fraser-Jenkins — American marsh fern — 33 images
Thelypteris simulata (Davenport) Holttum — Massachusetts fern — 23 images
Thermopsis villosa (Walter) Fern. & Schubert — hairy bushpea, Blue Ridge buckbean — 5 images
Thinopyrum pycnanthum (Pers.) Barkworth — seabeach quackgrass — 3 images
Thlaspi arvense L. — field pennycress — 35 images
Thuja occidentalis L. — arborvitae, northern white cedar, eastern white cedar — 14 images
Thymus pulegioides L. — European broad-leaved thyme, lemon thyme — 11 images
Tiarella cordifolia L. — foamflower — 21 images
Tilia americana L. var. americana — basswood, American linden — 49 images
Tilia cordata P.Miller — small-leaved linden, small-leaved lime, littleleaf linden — 16 images
Tilia cordata × T. mongolica — hybrid linden — 6 images
Tilia ×vulgaris Hayne — common lime — 2 images
Torreyochloa pallida (Torrey) Church var. pallida — pale mannagrass, Torrey's mannagrass — 11 images
Torreyochloa pallida var. fernaldii (A.S.Hitchc.) Dore ex Koyama & Kawano — slender mannagrass, Fernald's mannagrass — 17 images
Toxicodendron radicans (L.) Kuntze — poison ivy — 56 images
Toxicodendron rydbergi (Small ex Rydb.) Greene — creeping poison ivy — 5 images
Toxicodendron vernix (L.) Kuntze — poison sumac — 31 images
Tradescantia ohiensis Raf. — smooth spiderwort — 1 images
Tradescantia ohiensis × T. virginiana — hybrid spiderwort — 20 images
Tradescantia virginiana L. — Virginia spiderwort — 8 images
Tragopogon dubius Scop. — pale goat's beard — 22 images
Tragopogon pratensis L. — yellow goat's beard — 2 images
Trapa natans L. — water chestnut, water caltrop — 17 images
Triadenum virginicum (L.) Raf. — marsh St. John's-wort — 29 images
Trichostema dichotomum L. — forked bluecurls — 29 images
Trientalis borealis (Raf.) U.Manns & Anderb. — American starflower — 16 images
Trifolium agrarium L. — golden clover, palmate hopclover — 9 images
Trifolium arvense L. — rabbitfoot clover — 17 images
Trifolium campestre Schreber — low hopclover — 6 images
Trifolium dubium Sibth. — little hopclover — 10 images
Trifolium hybridum L. — alsike clover — 9 images
Trifolium pratense L. — red clover — 11 images
Trifolium repens L. — white clover — 18 images
Triglochin maritimum L. — saltmarsh arrowgrass — 25 images
Trillium cernuum L. var. cernuum — nodding trillium — 18 images
Trillium cuneatum Raf. — little sweet Betsy — 3 images
Trillium erectum L. — red trillium, purple trillium — 29 images
Trillium grandiflorum (Michx.) Salisb. — white trillium — 3 images
Trillium simile Gleason — jeweled wakerobin — 5 images
Trillium undulatum Willd. — painted trillium — 15 images
Triodanis perfoliata (L.) Nieuwl. — Venus' looking glass, clasping bellflower — 16 images
Triosteum aurantiacum Bicknell — orange-fruited horse gentian, early horse gentian, wild coffee — 21 images
Triplasis purpurea (Walter) Chapman — purple sandgrass — 23 images
Tsuga canadensis (L.) Carr. — eastern hemlock — 51 images
Tulipa gesneriana L. — garden tulip — 19 images
Tussilago farfara L. — coltsfoot — 50 images
Typha angustifolia L. — narrow-leaved cattail — 16 images
Typha latifolia L. — broad-leaved cattail — 30 images
Typha ×glauca Gordon — hybrid cattail: T. angustifolia × T. latifolia — 11 images
Ulmus americana L. — American elm, white elm — 31 images
Ulmus glabra Hudson — Scots elm, wych elm — 3 images
Ulmus procera Salisb. — English elm — 2 images
Ulmus pumila L. — Siberian elm, dwarf elm — 18 images
Ulmus rubra Muhl. — slippery elm — 8 images
Urtica dioica L. — stinging nettle — 26 images
Urtica gracilis Aiton — slender stinging nettle — 26 images
Utricularia cornuta Michaux — horned bladderwort, naked bladderwort — 38 images
Utricularia geminiscapa Benj. — twin-scaped bladderwort — 24 images
Utricularia gibba L. — humped bladderwort — 19 images
Utricularia inflata Walter — large floating bladderwort, swollen bladderwort, inflated bladderwort — 33 images
Utricularia intermedia Hayne — northern bladderwort, flat-leaved bldderwort — 31 images
Utricularia purpurea Walter — purple bladderwort — 36 images
Utricularia radiata Small — small floating bladderwort — 27 images
Utricularia resupinata B.D.Greene ex Bigelow — lavender bladderwort, northeastern bladderwort, resupinate bladderwort — 23 images
Utricularia vulgaris Le Conte — great bladderwort, common bladderwort — 26 images
Uvularia grandiflora Small — merrybells, large-flowered bellwort — 7 images
Uvularia sessilifolia L. — little merrybells — 45 images
Vaccaria hispanica (P.Miller) Rauschert — cow herb, cowcockle — 6 images
Vaccinium angustifolium Ait. — lowbush blueberry — 35 images
Vaccinium angustifolium var. nigrum (Wood) Dole — black-fruited lowbush blueberry — 8 images
Vaccinium caesariense Mackenzie — New Jersey highbush blueberry — 21 images
Vaccinium corymbosum L. — highbush blueberry — 73 images
Vaccinium fuscatum Ait. — black highbush blueberry — 35 images
Vaccinium macrocarpon Ait. — American cranberry, large cranberry — 59 images
Vaccinium myrtilloides Michaux — velvet-leaf blueberry, sourtop blueberry — 21 images
Vaccinium oxycoccos L. — small cranberry — 5 images
Vaccinium pallidum Ait. — hillside blueberry, dryland blueberry, early sweet blueberry — 57 images
Vaccinium stamineum L. — deerberry — 6 images
Vaccinium ×atlanticum Bicknell — hybrid blueberry — 13 images
Valeriana officinalis L. — common valerian, garden heliotrope, all-heal — 10 images
Vallisneria americana Michaux — tapegrass, water celery — 18 images
Veratrum californicum Durand var. californicum — Californian false hellebore — 1 images
Veratrum viride Aiton — false hellebore — 26 images
Verbascum blattaria L. — moth mullein — 18 images
Verbascum densiflorum Bertol. — large-flowered mullein — 5 images
Verbascum lychnitis L. — white mullein — 9 images
Verbascum thapsus L. — common mullein — 31 images
Verbena bonariensis L. — South American vervain, purpletop vervain — 17 images
Verbena bracteata Lag. & Rodr. — prostrate vervain — 12 images
Verbena hastata L. — blue vervain, common vervain — 21 images
Verbena urticifolia L. — white vervain — 17 images
Verbesina alternifolia (L.) Britton — wingstem — 10 images
Vernonia fasciculata Michaux — prairie ironweed — 18 images
Vernonia noveboracensis (L.) Michaux — New York ironweed — 29 images
Veronica arvensis L. — corn speedwell — 18 images
Veronica chamaedrys L. — birdseye speedwell, germander speedwell — 4 images
Veronica filiformis L. — creeping speedwell — 2 images
Veronica officinalis L. — common European speedwell, common gypsyweed, Paul's betony — 18 images
Veronica peregrina ssp. peregrina L. ssp. peregrina — purslane speedwell, neckweed — 7 images
Veronica peregrina ssp. xalapensis (Kunth) Pennell — Xalapa purslane speedwell, Jalapa purslane speedwell — 5 images
Veronica scutellata L. — marsh speedwell, narrow-leaved speedwell — 6 images
Veronica serpyllifolia L. — thyme-leaved speedwell — 29 images
Viburnum acerifolium L. — maple-leaf viburnum — 24 images
Viburnum dentatum var. lucidum Ait. — northern arrowwood — 32 images
Viburnum dentatum var. venosum (Britt.) Gleason — southern arrowwood — 1 images
Viburnum dilatatum Thunb. — linden viburnum, linden arrowwood — 21 images
Viburnum lantana L. — twistwood, wayfaring tree — 7 images
Viburnum lantanoides Michaux — hobblebush, witch-hobble — 25 images
Viburnum lentago L. — nannyberry, sweet viburnum — 41 images
Viburnum nudum L. var. nudum — smooth witherod — 2 images
Viburnum nudum var. cassinoides (L.) Torrey & A.Gray — wild raisin viburnum, witherod — 65 images
Viburnum opulus L. ssp. opulus — European highbush cranberry, guelder rose — 30 images
Viburnum opulus var. americanum (Marsh.) Clausen — American highbush cranberry — 6 images
Viburnum plicatum Thunb. — Japanese snowball viburnum — 12 images
Viburnum rhytidophyllum Hemsl. — leatherleaf viburnum — 2 images
Viburnum setigerum Hance — tea viburnum — 3 images
Viburnum ×rhytidophylloides Sur. — hybrid viburnum (twistwood × leatherleaf) — 7 images
Vicia cracca L. ssp. cracca — bird vetch — 13 images
Vicia hirsuta (L.) S.F.Gray — tiny vetch, hairy vetch — 3 images
Vicia sativa ssp. nigra (L.) Ehrh. — narrow-leaved vetch — 7 images
Vicia sativa ssp. sativa L. ssp. sativa — spring vetch, tare — 11 images
Vicia tetrasperma (L.) Schreber — four-seed vetch — 13 images
Vicia villosa Roth — hairy vetch — 4 images
Vinca major L. — greater periwinkle — 9 images
Vinca minor L. — common periwinkle — 32 images
Viola adunca J.E.Sm. var. adunca — sand violet — 15 images
Viola affinis Leconte — Leconte's violet, sand violet — 26 images
Viola arvensis Murray — field pansy — 7 images
Viola blanda Dewey — sweet white violet, large-leaved white violet — 25 images
Viola brittoniana Pollard — northern coastal violet, Britton's violet — 9 images
Viola brittoniana × V. pectinata — Britton's violet × comb violet — 5 images
Viola canadensis L. var. canadensis — tall white violet, Canada violet — 24 images
Viola cucullata Aiton — marsh blue violet — 19 images
Viola labradorica Schrank — American dog violet — 33 images
Viola lanceolata L. — bog white violet, lanceleaf violet — 40 images
Viola odorata var. dumetorum (Jord.) Rouy & Fouc. — English violet — 32 images
Viola pallens (Banks ex DC.) Brainerd — wild white violet, northern white violet, small white violet — 8 images
Viola palmata var. triloba L. var. palmata — palmate-leaved violet, three-lobed violet — 12 images
Viola pectinata Bicknell — comb violet — 21 images
Viola pedata L. — birdsfoot violet — 34 images
Viola primulifolia L. — primrose-leaf violet — 15 images
Viola pubescens Aiton var. pubescens — downy yellow violet — 8 images
Viola pubescens var. scabriuscula Schweinitz ex Torrey & A.Gray — smooth yellow violet — 17 images
Viola rostrata Pursh — long-spurred violet — 5 images
Viola sagittata Aiton var. sagittata — arrowleaf violet — 2 images
Viola sagittata var. ovata (Nutt.) Torrey & A.Gray — ovate-leaf violet — 58 images
Viola sororia Willd. — common blue violet — 40 images
Viola tricolor L. — garden violet, wild pansy, Johnny-jump-up — 9 images
Viola ×bissellii House — Bissell's violet (marsh blue × common blue) — 16 images
Vitis aestivalis Deam — silver-leaved summer grape — 17 images
Vitis aestivalis Michaux var. aestivalis — summer grape, pigeon grape — 7 images
Vitis labrusca L. — fox grape — 48 images
Vitis riparia Michaux — riverbank grape, frost grape — 5 images
Vitis vinifera L. — European grape — 12 images
Vitis ×novae-angliae Fern. — New England grape — 4 images
Vulpia myuros (L.) K.C.Gmelin — rattail annual fescue, mousetail annual fescue — 11 images
Vulpia octoflora var. tenella (Willd.) Fern. — six-weeks annual fescue — 16 images
Weigela floribunda (Sieb. & Zucc.) C.A.Mey. — crimson weigela — 1 images
Wisteria floribunda (Willd.) DC. — Japanese wisteria — 11 images
Wisteria sinensis (Sims) DC. — Chinese wisteria — 32 images
Wolffia brasiliensis Weddell — Brazilian watermeal — 4 images
Wolffia columbiana Karsten — globose watermeal — 6 images
Woodsia obtusa (Spreng.) Torr. ssp. obtusa — blunt-lobed cliff fern — 11 images
Woodwardia areolata (L.) T.Moore — netted chain fern — 39 images
Woodwardia virginica (L.) Smith — Virginia chain fern — 36 images
Xanthium strumarium L. var. strumarium — European cocklebur, European clotbur — 8 images
Xanthium strumarium var. canadense (P.Miller) Torrey & Gray — cocklebur, clotbur — 12 images
Xanthorhiza simplicissima Marsh. — yellowroot — 14 images
Xyris difformis Chapman — bog yellow-eyed grass — 26 images
Xyris montana Ries — northern yellow-eyed grass — 8 images
Xyris smalliana Nash — quagmire yellow-eyed grass — 7 images
Xyris torta Small — twisted yellow-eyed grass — 30 images
Yucca filamentosa L. — Spanish bayonet, Adam's needle — 17 images
Zannichellia palustris L. — horned pondweed — 5 images
Zanthoxylum americanum P.Miller — northern prickly ash, common prickly ash — 13 images
Zea mays L. — corn — 4 images
Zelkova serrata (Thunb.) Makino — Japanese zelkova — 15 images
Zizania aquatica L. — wild rice — 28 images
Zizia aurea (L.) Koch — golden alexanders — 13 images