Index of Latin Names

Abeliophyllum distichum Nakai — 1 image
Abies balsamea (L.) P. Miller — balsam fir — 27 images
Abutilon theophrasti Medicus — velvetleaf — 2 images
Acalypha rhomboidea Raf. — three-seeded mercury — 7 images
Acer campestre L. — hedge-maple — 1 image
Acer negundo L. — boxelder — 6 images
Acer negundo var. violaceum (Kirsch.) Jaeg. — boxelder — 18 images
Acer palmatum Thunb. — Japanese maple — 3 images
Acer pensylvanicum L. — striped maple — 21 images
Acer platanoides L. — Norway maple — 18 images
Acer pseudoplatanus L. — sycamore maple — 12 images
Acer rubrum L. — red maple — 61 images
Acer saccharinum L. — silver maple — 27 images
Acer saccharum Marsh. — sugar maple — 16 images
Acer sp. — 3 images
Achillea millefolium L. — yarrow — 9 images
Acorus calamus L. — sweetflag — 16 images
Actaea pachypoda Ell. — doll's eyes, white baneberry — 12 images
Adiantum pedatum L. — northern maidenhair — 9 images
Aegopodium podagraria L. — goutweed — 14 images
Aesculus hippocastanum L. — horse-chestnut — 4 images
Aethusa cynapium L. — fool's parsley — 13 images
Agalinis maritima (Raf.) Raf. ( = Gerardia maritima Raf.) — saltmarsh false foxglove — 12 images
Agalinis purpurea (L.) Pernnell ( = Gerardia purpurea L.) — purple false foxglove — 23 images
Agalinis tenuifolia (Vahl.) Raf. ( = Gerardia tenuifolia Vahl.) — slender gerardia — 6 images
Ageratina altissima (L.) King et H.E.Robinson ( = Eupatorium rugosum Houtt.) — white snakeroot — 14 images
Agrimonia gryposepala Wallr. — common agrimony, woodland agrimony — 9 images
Agrostis scabra Willd. — northern ticklegrass — 10 images
Ailanthus altissima (P. Miller) Swingle — tree-of-heaven — 45 images
Aira caryophyllea L. — silvery hairgrass — 8 images
Aira praecox L. — strict hairgrass — 8 images
Ajuga reptans — common bugle — 4 images
Akebia quinata (Houtt.) Dcne. — five-leaved akebia — 17 images
Albizzia julibrissin Durazz. — silk tree — 1 image
Aletris farinosa L. — colic-root — 9 images
Alisma subcordatum Raf. ( = plantago-aquatica var. parviflorum (Pursh) Torrey) — lesser water-plantain, southern water-plantain — 2 images
Alisma triviale Pursh ( = plantago-aquatica var. americanum Schultes et Schultes) — larger water-plantain, northern water-plantain — 7 images
Alliaria petiolata (Bieb.) Cavara et Grande ( = officinalis Andrz.) — garlic mustard — 12 images
Allium canadense L. — wild garlic — 3 images
Allium tricoccum Ait. — wild leek — 2 images
Allium vineale L. — field garlic — 5 images
Alnus glutinosa (L.) Gaertner — European alder — 12 images
Alnus rugosa (Du Roi) Spreng. — speckled alder — 36 images
Alnus serrulata (Ait.) Willd. — smooth alder, common alder — 27 images
Alopecurus pratensis L. — meadow foxtail — 2 images
Amaranthus blitoides S. Watson — prostrate amaranth, tumbleweed — 4 images
Amaranthus blitum ssp. emarginatus Carreter ( = lividus L.) — livid amaranth — 9 images
Amaranthus hybridus L. — slim amaranth, smooth pigweed — 2 images
Ambrosia artemisiifolia L. — annual ragweed — 15 images
Ambrosia psilostachya DC. — western ragweed — 2 images
Amelanchier arborea (Michaux f.) Fern. — common serviceberry, smooth shadbush — 16 images
Amelanchier canadensis (L.) Medicus — thicket shadbush, eastern serviceberry, juneberry — 34 images
Amelanchier cf. laevis — shadbush, serviceberry — 33 images
Amelanchier laevis Wiegand ( = arborea var. laevis (Wieg.) Ahles) — smooth shadbush — 8 images
Amelanchier micropetala (B.L.Robins) Ashe ( = stolonifera f. micropetala (B.L.Robins) Rehder, nantucketensis auct., in part) — shadbush — 9 images
Amelanchier nantucketensis Bickn. — Nantucket shadbush — 10 images
Amelanchier spicata (Lam.) K. Koch ( = stolonifera Wiegand) — running serviceberry, running shadbush — 35 images
Ammophila breviligulata Fern. — dune grass — 20 images
Amorpha fruticosa L. — indigo bush — 14 images
Ampelopsis brevipedunculata (Maxim.) Trautv. ( = heterophylla var. brevipedunculata C. L. Li) — Amur peppervine, porcelain berry — 9 images
Amphicarpaea bracteata (L.) Fern. — hog-peanut — 7 images
Anagallis arvensis L. — scarlet pimpernel — 6 images
Andromeda polifolia var. glaucophylla (Link) DC. — bog rosemary — 3 images
Andropogon gerardii Vitman — big bluestem — 19 images
Andropogon glomeratus (Walter) B.S.P. ( = virginicus var. abbreviatus (Hackel) Fern. et Grisc.) — bunched broomsedge — 13 images
Andropogon virginicus L. — Virginia broomsedge — 7 images
Anemone canadensis L. — Canada anemone — 2 images
Anemone quinquefolia L. — wood anemone, windflower — 22 images
Anemone virginiana L. — thimbleweed — 1 image
Angelica lucida L. — seaside angelica — 21 images
Antennaria neglecta Greene — pussytoes — 6 images
Antennaria neodioica Greene ( = howellii ssp. neodioica (Greene) Bayer) — Greene's pussytoes — 10 images
Antennaria plantaginifolia (L.) Richardson — plantain-leaved pussytoes — 9 images
Anthoxanthum aristatum Boiss. — awned vernalgrass, Puel's vernalgrass — 3 images
Anthoxanthum odoratum L. — sweet vernalgrass — 16 images
Anthriscus sylvestris (L.) Hoffmann — chervil — 11 images
Apios americana Medik. — groundnut — 10 images
Apocynum androsaemifolium L. — spreading dogbane — 14 images
Apocynum cannabinum L. — Indian hemp — 7 images
Aquilegia canadensis L. — wild columbine, red columbine — 27 images
Aquilegia vulgaris L. — garden columbine, European columbine — 3 images
Arabidopsis thaliana (L.) Heynh. — mouse-ear cress — 26 images
Arabis canadensis L. ( = Boechera canadensis (L.) Al-SHehbaz) — sickle-pod — 10 images
Arabis glabra (L.) Bernh. ( = Turritis glabra L.) — tower mustard — 15 images
Aralia elata (Miq.) Seem. — 27 images
Aralia hispida Vent. — bristly sarsaparilla — 20 images
Aralia nudicaulis L. — wild sarsaparilla — 19 images
Arceuthobium pusillum Peck — eastern dwarf mistletoe — 3 images
Arctium lappa L. — great burdock — 8 images
Arctium minus Bernh. — lesser or common burdock — 7 images
Arctostaphylos uva-ursi (L.) Sprengel — bearberry — 23 images
Arethusa bulbosa L. — dragon's mouth — 7 images
Arisaema triphyllum (L.) Schott — Jack-in-the-pulpit — 16 images
Aristida dichotoma Michaux — poverty-grass — 5 images
Aronia melanocarpa (Michx.) Ell. ( = Photinia melanocarpa (Michaux) Robertson et Phipps) — black chokeberry — 27 images
Aronia mitschurinii Skvorts. ( = melanocarpa x Sorbus aucuparia ) — cultivar 'Viking' — 3 images
Aronia x prunifolia (Marsh.) Rehder ( = x floribunda (Lindl.) Spach) — purple chokeberry — 19 images
Arrhenatherum elatius (L.) J. et K. Presl — tall oatgrass — 9 images
Artemisia campestris ssp. caudata (Michaux) Hall et Clements — seaside wormwood — 23 images
Artemisia stelleriana Bess. — dustymiller, beach wormwood — 18 images
Artemisia vulgaris L. — common wormwood, mugwort — 13 images
Asarum canadense L. — Canadian wild ginger — 7 images
Asclepias amplexicaulis Sm. — clasping milkweed — 13 images
Asclepias exaltata L. — tall milkweed — 6 images
Asclepias incarnata ssp. pulchra (Ehrh. ex Willd.) Woodson — downy swamp milkweed — 27 images
Asclepias quadrifolia Jacq. — four-leaved milkweed — 3 images
Asclepias syriaca L. — common milkweed — 24 images
Asclepias tuberosa L. — butterfly milkweed — 15 images
Asparagus officinalis L. — garden asparagus — 11 images
Asplenium platyneuron (L.) B.S.P. — ebony spleenwort — 12 images
Asplenium trichomanes L. — maidenhair spleenwort — 1 image
Aster acuminatus Michaux ( = Oclemena acuminata (Michx.) Greene 1903) — whorled wood aster — 14 images
Aster cordifolius Michaux ( = Symphyotrichum cordifolium G.L.Nesom 1994) — blue heart-leaf aster — 9 images
Aster divaricatus L. ( = Eurybia divaricata (L.) G.L.Nesom 1994) — white wood aster — 10 images
Aster dumosus L. ( = Symphyotrichum dumosum G.L.Nesom 1994) — long-stalked aster — 14 images
Aster ericoides L. ( = Symphyotrichum ericoides (L.) Nesom) — heath white aster — 13 images
Aster laevis L. ( = Symphyotrichum laeve A. et D. Löve 1982) — smooth aster — 13 images
Aster lanceolatus Willd. ( = Symphyotrichum lanceolatum Nesom 1994) — tall white aster, panicled aster — 6 images
Aster lateriflorus (L.) Britton ( = Symphyotrichum lateriflorum (L.) A. et D. Löve 1982) — calico aster — 5 images
Aster macrophyllus L. ( = Eurybia macrophylla (L.) Cassini 1825) — large-leaved aster — 16 images
Aster novae-angliae L. ( = Symphyotrichum novae-angliae Nesom 1994) — New England aster — 21 images
Aster novi-belgii L. ( = Symphyotrichum novi-belgii (L.) Nesom 1994) — New York aster — 32 images
Aster patens Ait. ( = Symphyotrichum patens (Ait.) Nesom 1994) — clasping aster, skydrops — 12 images
Aster pilosus Willd. ( = Symphyotrichum pilosum (Willd.) Nesom) — white oldfield aster — 31 images
Aster pilosus var. pringlei (A. Gray) Blake ( = Symphyotrichum pilosum var. pringlei (A. Gray) Nesom) — Pringle's aster — 8 images
Aster puniceus L. ( = Symphyotrichum puniceum A. et D. Löve 1982) — bristly aster, swamp aster — 6 images
Aster racemosus Ell. ( = Symphyotrichum racemosum Nesom 1994) — smooth white oldfield aster — 6 images
Aster spectabilis Ait. ( = Eurybia spectablis (Ait.) G.L.Nesom 1994) — showy aster — 34 images
Aster subulatus Mischaux ( = Symphyotrichum subulatum (Michaux) Nesom) — annual saltmarsh aster — 10 images
Aster tenuifolius L. ( = Symphyotrichum tenuifolium (L.) Nesom) — perennial saltmarsh aster — 20 images
Aster tradescantii L. ( = Symphyotrichum tradescantii (L.) Nesom) — Tradescant's aster — 4 images
Aster umbellatus P. Miller ( = Doellingeria umbellata (Mill.) Nees 1832) — tall flat-topped white aster — 14 images
Aster undulatus L. ( = Symphyotrichum undulatum (L.) Nesom 1994) — clasping hartleaf aster — 10 images
Aster x blakei (Porter) House ( = Oclemena x blakei (Porter) Nesom, acuminatus x nemoralis ) — Blake's aster — 4 images
Athyrium filix-femina var. angustum (Willd.) Lawson — northern lady fern — 26 images
Atriplex cristata Humb. et Bonpl. ex Willd. ( = arenaria Nutt.) — seabeach orache — 10 images
Atriplex glabriuscula Edmondston — prostrate orache — 12 images
Atriplex prostrata Boucher ex DC ( = A. patula var. hastata auct. non (L.) A. Gray) — halberd-leaf orache — 23 images
Aureolaria pedicularia (L.) Raf. ( = Gerardia pedicularia L.) — fernleaf yellow false foxglove — 25 images
Aureolaria virginica (L.) Pernnell ( = Gerardia virginica (L.) B.S.P.) — downy false foxglove — 6 images
Avena sativa L. — oats — 1 image
Baccharis halimifolia L. — sea-myrtle — 20 images
Baptisia tinctoria (L.) R. Br. ex Ait. f. — yellow wild indigo, horsefly weed — 10 images
Barbarea stricta Andrz. — upright yellow rocket — 3 images
Barbarea vulgaris R. Br. — yellow rocket — 31 images
Bartonia paniculata (Michaux) Muhl. — panickled screwstem — 6 images
Bartonia virginica (L.) B.S.P. — screwstem — 18 images
Berberis thunbergii DC. — Japanese barberry — 16 images
Berberis vulgaris L. — common barberry — 15 images
Berteroa incana (L.) DC. — hoary alyssum — 5 images
Betula alleghaniensis Britt. ( = lutea Michx.) — yellow birch — 29 images
Betula lenta L. — sweet birch, cherry birch, black birch — 17 images
Betula nigra L. — river birch — 25 images
Betula papyrifera Marsh. — paper birch — 27 images
Betula papyrifera x populifolia — paper birch x gray birch — 4 images
Betula pendula Roth — silver birch — 7 images
Betula pendula x populifolia — 4 images
Betula populifolia Marsh. — gray birch — 32 images
Betula pubescens Ehrh. — European downy birch — 6 images
Betula pumila L. — swamp birch, fen birch — 8 images
Bidens cernua L. — nodding bur-marigold — 4 images
Bidens connata Muhl. ex Willd. — swamp beggar-ticks — 12 images
Bidens coronata (L.) Britton — northern tickseed sunflower — 10 images
Bidens discoidea (Torrey et A. Gray) Britton — small beggar-ticks — 8 images
Bidens frondosa L. — beggar-ticks — 13 images
Bidens vulgata Greene — tall beggar-ticks — 7 images
Boehmeria cylindrica (L.) Sw. — false nettle, bog-hemp — 10 images
Botrychium dissectum Sprengel — cut-leaved grape-fern — 8 images
Botrychium virginianum (L.) Sw. — rattlesnake-fern — 13 images
Brachyelytrum septentrionale (Babel) G. Tucker ( = aristosum (Michaux) Trel., erectum var. septentrionale Babel) — woodgrass — 6 images
Brasenia schreberi J.F. Gmel. — watershield — 24 images
Briza maxima L. — big quaking grass — 3 images
Bromus inermis Leysser — awnless brome — 4 images
Bromus pubescens Muhl. ex Willd. — woodland brome or Canada brome — 5 images
Bromus sterilis L. — barren brome — 4 images
Bromus tectorum L. — drooping brome, downy chess — 9 images
Buddleja davidii Franch. — butterfly bush, summer lilac — 19 images
Bulbostylis capillaris (L.) C.B. Clarke — tufted hairsedge — 13 images
Cabomba caroliniana A. Gray — Carolina fanwort — 35 images
Cakile edentula (Bigelow) Hook. — sea rocket — 18 images
Calamagrostis canadensis (Michaux) Beauv. — Canada bluejoint — 35 images
Calamagrostis cinnoides W. Barton ( = coarctata (Torrey) Eaton) — reed bluejoint — 15 images
Calamagrostis epigeios (L.) Roth — feathertop, bushgrass — 10 images
Calamagrostis pickeringii A. Gray — Pickering's reedgrass — 17 images
Calla palustris L. — water-arum — 15 images
Callitriche heterophylla Pursh — variable water-starwort — 9 images
Callitriche stagnalis Scop. — water chickweed — 31 images
Calluna vulgaris (L.) Hull — Scotch heather — 16 images
Calopogon tuberosus (L.) B.S.P. — grass-pink — 8 images
Caltha palustris L. — marsh marigold — 10 images
Calystegia sepium (L.) R. Br. — morning-glory — 11 images
Campanula rapunculoides L. — rampion or creeping bellflower — 3 images
Campsis radicans (L.) Seemann ex Bureau — trumpet creeper — 10 images
Capsella bursa-pastoris (L.) Medicus — shepherd's purse — 14 images
Cardamine bulbosa (Schreb. ex Muhl.) B.S.P. — bulbous bittercress, spring cress — 7 images
Cardamine diphylla (Michaux) Wood ( = Dentaria diphylla Michaux) — crinkleroot — 6 images
Cardamine flexuosa With. — greater bittercress — 40 images
Cardamine hirsuta L. — hairy rock-cress, hoary bittercress — 30 images
Cardamine parviflora var. arenicola (Britton) O.E. Schulz — narrow-leaved bittercress — 11 images
Cardamine pensylvanica — common bittercress — 5 images
Cardamine pratensis L. — cuckoo-flower — 14 images
Carex albicans var. emmonsii J. Rettig ( = emmonsii Dewey ex Torrey) — Emmons' sedge — 5 images
Carex albursina Sheldon — white bear sedge — 1 image
Carex annectens (Bickn.) Bickn. — yellow-fruited fox sedge — 9 images
Carex arctata Boott ex Hooker — northern wood sedge — 4 images
Carex argyrantha Tuckermann — silvery sedge — 5 images
Carex atlantica ssp. capillacea (Bailey) Reznicek ( = howei Mackenzie) — threadstem sedge — 8 images
Carex billingsii (Knight) C.D. Kirschbaum ( = trisperma var. billingsii Knight) — three-seeded bog sedge — 6 images
Carex blanda Dewey — woodland sedge — 6 images
Carex bromoides Schkuhr ex Willd. — brome-like sedge — 6 images
Carex bullata Schkuhr ex Willd. — button sedge — 19 images
Carex canescens ssp. disjuncta (Fern.) Toivonen — silvery bog sedge — 5 images
Carex cephalophora Muhl. ex Willd. — oval-headed sedge — 12 images
Carex communis Bailey — common sedge — 8 images
Carex comosa Boott — bristly sedge — 19 images
Carex crawfordii Fernald — Crawford's sedge — 8 images
Carex crinita Lam. — fringed sedge — 14 images
Carex cumulata (Bailley) Mackenzie — crowded sedge — 14 images
Carex debilis var. rudgei Bayley — northern stalked sedge — 8 images
Carex deweyana Schweinitz — round-fruited short-scaled sedge — 7 images
Carex echinata Murray ( = angustior Mackenzie, cephalantha (Balley) Bicknell) — prickly sedge — 1 image
Carex folliculata L. — long-culmed sedge — 16 images
Carex gracillima Schwein. — slender drooping sedge — 2 images
Carex gynandra Schwein. ( = crinita var. gynandra (Schwein.) Schwein. et Torrey) — northern awned sedge — 8 images
Carex haydenii Dewey — Hayden's sedge — 6 images
Carex hormathodes Fernald — saltmarsh straw sedge — 11 images
Carex intumescens Rudge — bladder-sedge or swamp sedge — 15 images
Carex lacustris Willd. — marsh sedge, lakeside sedge — 12 images
Carex lasiocarpa var. americana Fern. — slender woolly-fruited sedge — 9 images
Carex laxiflora Lam. — loose-flowered woodland sedge — 22 images
Carex leptalea Wahlenb. — delicate sedge — 4 images
Carex longii Mackenzie — Long's sedge — 9 images
Carex lucorum Willd. ex Link ( = Carex pensylvanica var distans Peck) — long-beaked Pennsylvania sedge — 6 images
Carex lupuliformis Sartwell ex Dewey — 2 images
Carex lupulina Muhl. ex Willd. — hop sedge — 6 images
Carex lurida Wahlenb. — sallow sedge — 18 images
Carex muehlenbergii Shkuhr. ex Willd. — Muhlenberg's sedge — 3 images
Carex novae-angliae Schwein. — New England sedge — 4 images
Carex oligosperma Michaux — few fruited sedge — 5 images
Carex paleacea Schreber ex Wahlenb. — saltmarsh sedge — 4 images
Carex pallescens L. — pale sedge — 4 images
Carex panicea L. — millet sedge — 5 images
Carex pensylvanica Lam. — Pennsylvania sedge — 11 images
Carex plantaginea Lam. — plantain-leaf sedge — 2 images
Carex platyphylla Carey — broad-leaved woodland sedge — 2 images
Carex polymorpha Muhl. — variable sedge — 5 images
Carex projecta Mackenzie — beaded broom-sedge or necklace broom-sedge — 3 images
Carex radiata (Wahlenb.) Small — star-sedge — 5 images
Carex retroflexa Muhl. ex Willd. — reflexed sedge — 7 images
Carex rosea Schkuhr ex Willd. — big star sedge — 4 images
Carex scoparia Schkuhr ex Willd. — broom sedge — 9 images
Carex siccata Dewey ( = foenea auct. non Willd.) — dry land sedge — 6 images
Carex silicea Olney — sea-beach sedge — 8 images
Carex stipata Muhl. ex Willd. — awl-fruited sedge — 8 images
Carex straminea Willd. ex Schkuhr — straw sedge — 8 images
Carex striata Michx. ( = walteriana Bailey) — Walter's sedge — 8 images
Carex stricta Lam. — tussock sedge — 10 images
Carex swanii (Fern.) Mackenzie — Swan's sedge — 17 images
Carex tenera Dewey — slender straw sedge — 5 images
Carex tonsa (Fern.) Bickn. ( = rugosperma var. tonsa (Fern.) E. Voss) — stiff-leaved sand sedge, shaved sedge — 22 images
Carex torta Boott ex Tuckerman — riverside sedge — 9 images
Carex tribuloides Wahlenb. — blunt broom sedge — 10 images
Carex trisperma Dewey — three-seeded sedge — 9 images
Carex typhina Michaux — cat-tail sedge — 4 images
Carex utriculata Boott ( = rostrata var. utriculata (Boott) Bailey) — bottle sedge — 11 images
Carex vestita Willd. — velvet-fruited sedge — 4 images
Carex virescens Muhl. ex Willd. — ribbed sedge — 4 images
Carex vulpinoidea Michaux ( = setacea Dewey) — fox sedge — 13 images
Carpinus caroliniana Walter — ironwood, hornbeam — 19 images
Carya alba (L.) Nutt. ex Ell. ( = tomentosa (Lam. ex Poiret) Nutt.) — mockernut hickory — 19 images
Carya cordiformis (Wangenh.) K. Koch — bitternut hickory, swamp hickory — 24 images
Carya glabra (P. Miller) Sweet ( = ovalis (Wangenh.) Sarg.) — pignut hickory — 26 images
Carya ovata (P. Miller) K. Koch — shagbark hickory — 20 images
Castanea dentata (Marsh.) Borkh. — American chestnut — 45 images
Catalpa bignonioides Walter — southern catalpa — 5 images
Caulophyllum thalictroides (L.) Michaux — blue cohosh — 4 images
Ceanothus americanus L. — New Jersey tea — 12 images
Celastrus orbiculatus Thunb. — Oriental bittersweet, Asian bittersweet — 63 images
Celastrus scandens L. — American bittersweet — 8 images
Celtis occidentalis L. — common hackberry — 24 images
Celtis sp. — 3 images
Cenchrus spinifex Cav. ( = parviflorus Benth.) — coastal sandbur — 9 images
Centaurea jacea L. — brown knapweed — 13 images
Centaurea nigrescens Willd. ( = vochinensis Bernh. ex Reichenb.) — Wocheiner knapweed — 4 images
Centaurea stoebe ssp. micranthos (Gugler) Hayek ( = maculosa auct.) — spotted or bushy knapweed — 51 images
Centaurium pulchellum (Sw.) Druce — branching centaury — 4 images
Cephalanthus occidentalis L. — common buttonbush — 15 images
Cerastium vulgatum L. ( = fontanum ssp. vulgare (Hartman) Greuter et Burdet) — common mouse-ear chickweed — 15 images
Ceratophyllum demersum L. — hornwort, coontail — 7 images
Ceratophyllum echinatum A. Gray — forked coontail — 3 images
Cercidiphyllum japonicum Zieb. et Zucc. — katsura tree — 1 image
Chaenomeles speciosa (Sweet) Nakai — Japanese flowering quince — 4 images
Chamaecrista fasciculata (Michaux) Greene ( = Cassia fasciculata Michaux) — partridge pea — 9 images
Chamaecrista nictitans (L.) Moench ( = Cassia nictitans L.) — wild sensitive plant — 8 images
Chamaecyparis thyoides (L.) B.S.P. — Atlantic white cedar — 57 images
Chamaedaphne calyculata (L.) Moench — leatherleaf, cassandra — 20 images
Chelidonium majus L. — celandine — 3 images
Chelone glabra L. — white turtlehead — 9 images
Chenopodium album L. — pigweed, lamb's quarters — 18 images
Chenopodium ambrosioides L. ( = Dysphania ambrosioides (L.) Mosyakin et Clemants) — Mexican tea, wormseed — 14 images
Chenopodium berlandieri var. macrocalycium (Aellen) Cronq. ( = macrocalycium Aellen) — seabeach pigweed — 33 images
Chenopodium glaucum L. — oak-leaf goosefoot — 3 images
Chenopodium rubrum L. — coast-blite, red goosefoot — 14 images
Chenopodium simplex (Torrey) Raf. ( = hybridum L.) — maple-leaf goosefoot — 7 images
Chimaphila maculata (L.) Pursh — striped pipsissewa, spotted wintergreen — 11 images
Chimaphila umbellata ssp. cisatlantica (Blake) Hulten — pipsissewa — 7 images
Chionodoxa luciliae Boiss. — glory-of-the-snow — 6 images
Chrysosplenium americanum Schwein. ex Hooker — golden saxifrage, water-carpet — 17 images
Cichorium intybus L. — chicory — 7 images
Cicuta bulbifera L. — bulblet water-hemlock — 12 images
Cicuta maculata L. — water-hemlock — 12 images
Cinna arundinacea L. — common woodreed — 2 images
Circaea luteniana var. canadensis L. ( = candensis (L.) Hill) — enchanter's nightshade — 11 images
Cirsium arvense (L.) Scop. — Canada thistle — 11 images
Cirsium horridulum Michaux — yellow thistle — 8 images
Cirsium pumilum (Nutt.) Sprengel — pasture thistle — 15 images
Cirsium vulgare (Savi) Ten. — bull thistle — 23 images
Cladium mariscoides (Muhl.) Torrey — twig-sedge — 12 images
Cladrastis kentukea (Dum.-Cours.) Rudd — yellowwood — 8 images
Claytonia caroliniana Michx. — broad-leaved spring-beauty — 4 images
Clematis terniflora DC. ( = dioscoreifolia Levl. et Vaniot) — yam-leaf clematis — 11 images
Clematis virginiana L. — virgin's-bower — 11 images
Clethra alnifolia L. — sweet pepperbush — 32 images
Clinopodium vulgare L. ( = Satureja vulgaris (L.) Fritsch) — wild basil — 5 images
Clintonia borealis (Aiton) Ref. — bluebead-lily — 16 images
Colutea arborescens L. — bladder senna — 3 images
Comandra umbellata (L.) Nutt. — bastard toadflax — 20 images
Comarum palustre L. ( = Potentilla palustris (L.) Scop.) — marsh cinquefoil — 10 images
Commelina communis L. — dayflower — 3 images
Comptonia peregrina (L.) Coulter — sweetfern — 20 images
Conopholis americana (L.) Wallr. f. — squaw-root, cancer-root — 10 images
Convallaria majalis L. — lily-of-the-valley — 7 images
Conyza canadensis (L.) Cronq. ( = Erigeron canadensis L.) — horseweed, hogweed — 26 images
Coptis trifolia ssp. groenlandica (Oeder) Hulten ( = trifolia (L.) Salisb.) — three-leaf goldthread — 17 images
Corallorhiza trifida Chatelain — pale or early coralroot — 1 image
Corema conradii (Torrey) Torrey ex Loudon — broom-crowberry — 36 images
Coreopsis lanceolata L. — lanceleaf tickseed — 6 images
Coreopsis rosea Nutt. — pink tickseed — 33 images
Cornus alternifolia L. f. ( = Swida alternifolia (L.f.) Small) — pagoda dogwood, alternate-leaved dogwood — 16 images
Cornus amomum P. Miller ( = Swida amomum (P. Miller) Small) — silky dogwood — 15 images
Cornus canadensis L. ( = Chamaepericlymenum canadense (L.) Aschers. et Graebn.) — bunchberry, dwarf cornel — 12 images
Cornus florida L. ( = Benthamidia florida (L.) Spach) — flowering dogwood — 26 images
Cornus racemosa Lam. ( = Swida racemosa (Lam.) Moldenke) — gray dogwood — 8 images
Cornus rugosa Lam. ( = Swida rugosa (Lam.) Rydb.) — round-leaved dogwood, talus dogwood — 6 images
Cornus sericea L. ( = Swida sericea (L.) Holub, stolonifera Michaux) — red osier — 4 images
Coronilla varia L. — crown-vetch — 2 images
Corydalis sempervirens (L.) Pers. ( = Capnoides sempervirens (L.) Borkh.) — pale corydalis or rock-harlequin — 19 images
Corylus americana Walt. — American hazelnut — 22 images
Corylus cornuta Marsh. — beaked hazelnut — 18 images
Cotoneaster divaricatus Rehd. et Wilson in Sarg. — spreading cotoneaster — 3 images
Crataegus crus-galli L. — cockspur hawthorn — 8 images
Crataegus submollis Sarg. ( = arnoldiana Sarg., pennsylvanica Ashe, champlainensis Sarg., mollis Scheele) — downy hawthorn — 2 images
Crepis sp. — 1 image
Crocus vernus (L.) Hill — spring crocus — 2 images
Cuscuta gronovii Willd. ex J.A. Schultes — dodder — 18 images
Cynanchum louiseae Kartez et Ghandi ( = nigrum (L.) Pers.) — black swallowwort — 19 images
Cynanchum rossicum (Kleopov) Borhidi — pale swallowwort — 10 images
Cyperus dentatus Torrey — pondshore flatsedge — 17 images
Cyperus grayi Torr. — Gray's flatsedge — 22 images
Cyperus lupulinus (Spreng.) Marcks ( = filiculmis Vahl) — slender sand flatsedge — 15 images
Cyperus strigosus L. — straw-colored flatsedge — 17 images
Cypripedium acaule Aiton — pink lady's slipper — 7 images
Cystopteris fragilis (L.) Bernh. — fragile fern — 11 images
Cystopteris tenuis (Michaux) Desvaux ( = fragilis var. mackayi Lawson) — MacKay's fragile fern or brittle fern — 5 images
Cytisus scoparius (L.) Link — scotch broom — 6 images
Dactylis glomerata L. — orchard grass — 6 images
Dalibarda repens L. ( = Rubus dalibarda L.) — dewdrop — 2 images
Danthonia compressa Austin ex Peck — trail oatgrass — 19 images
Danthonia spicata (L.) Beauv. — wild oatgrass, poverty grass — 6 images
Datura stramonium L. — Jimson-weed — 7 images
Daucus carota L. — Queen Anne's lace — 5 images
Decodon verticillatus (L.) Ell. — swamp loosestrife, waterwillow — 28 images
Delosperma cooperi (Hook. f.) L. Bolus ( = Mesembryanthemum cooperi Hook. f.) — Cooper's hardy iceplant, trailing iceplant — 17 images
Dennstaedtia punctilobula (Michaux) T. Moore — hayscented fern — 17 images
Deparia acrostichoides (Swartz) M. Kato ( = Asplenium acrostichoides Sw.) — silvery spleenwort — 5 images
Deschampsia flexuosa (L.) Trin. — common hairgrass — 8 images
Desmodium canadense (L.) DC. — showy ticktrefoil — 14 images
Desmodium ciliare (Muhl. ex Willd.) DC. — hairy small-leaved ticktrefoil — 9 images
Desmodium glutinosum (Muhl. ex Willd.) Wood ( = Hylodesmum glutinosum (Mull. ex Willd.) H.Ohashi et R.R. Mill) — cluster-leaved ticktrefoil — 5 images
Desmodium marilandicum (L.) DC. — Maryland or smooth small-leaved ticktrefoil — 10 images
Desmodium nudiflorum (L.) DC. ( = Hylodesmum nudiflorum (L.) H. Ohashi et R.R. Mill) — naked ticktrefoil — 5 images
Desmodium paniculatum (L.) DC. — panicled ticktrefoil — 6 images
Desmodium perplexum Schub. ( = glabellum (Mischx.) DC.) — perplexing ticktrefoil — 3 images
Desmodium rotundifolium DC. — prostrate ticktrefoil — 7 images
Desmodium x humifusum (Muhl. ex Bigelow) Beck ( = D. paniculatum x D. rotundifolium ) — spreading ticktrefoil — 3 images
Dianthus armeria L. — debtford pink — 5 images
Dicentra cucullaria (L.) Bernh. — Dutchman's breeches — 7 images
Dichanthelium acuminatum var. fasciculatum (Torrey) Freckmann ( = Panicum lanuginosum Ell.) — fascicled panic-grass — 18 images
Dichanthelium acuminatum var. implicatum (Scribn.) Freckmann et Lelong ( = Panicum meridionale Ashe, Panicum implicatum (Scribn.) Fern.) — pondshore panic-grass — 8 images
Dichanthelium clandestinum (L.) Gould ( = Panicum clandestinum L.) — deer-tongue — 10 images
Dichanthelium depauperatum (Muhl.) Gould — depauperate panic-grass — 3 images
Dichanthelium dichotomum (L.) Gould ( = Panicum dichotomum L.) — forked panic-grass — 11 images
Dichanthelium latifolium (L.) Gould et Glark — broad-leaved panic-grass — 7 images
Dichanthelium linearifolium (Scribner) Gould ( = Panicum linearifolium Scribner) — linear-leaved panic-grass — 4 images
Dichanthelium oligosanthes var. scribnerianum (Nash) Gould — Scribner's panic-grass — 9 images
Dichanthelium sphaerocarpon (Ell.) Gould — round-fruited panic-grass — 10 images
Dichanthelium spretum (J.A. Schultes) Freckmann ( = acuminatum var. spretum (J.A. Schultes) Freckm. et Lelong) — smooth panic grass — 4 images
Dichanthelium wrightianum (Scribner) Freckmann ( = Panicum wrightianum Scribner) — Wright's panic grass — 2 images
Diervilla lonicera L. — bush-honeysuckle — 14 images
Digitalis purpurea L. — common foxglove — 4 images
Digitaria ischaemum (Schreber) Muhl. — smooth crabgrass — 2 images
Digitaria sanguinalis (L.) Scop. — large crabgrass — 12 images
Digitaria violascens Link ( = ischaemum var. violascens (Link) Radford) — violet crabgrass — 9 images
Diodia teres Walter — buttonweed — 15 images
Diphasiastrum digitatum (Dill. ex A. Br.) Holub ( = Lycopodium digitatum Dill. ex A. Brown, Lycopodium complanatum var. flabelliforme Fern.) — southern ground-cedar — 19 images
Diphasiastrum tristachyum (Pursh) Holub ( = Lycopodium tristachyum Pursh) — slender ground-cedar, wiry ground-cedar — 4 images
Dipsacus fullonum L. — common teasel — 4 images
Dirca palustris L. — leatherwood — 5 images
Distichlis spicata (L.) Greene — salt grass — 13 images
Doronicum pardalianches L. — great leopard's bane — 6 images
Draba verna L. — whitlow-grass — 21 images
Drosera filiformis Raf. — thread-leaf sundew — 26 images
Drosera intermedia Hayne — spoonleaf sundew — 14 images
Drosera rotundifolia L. — roundleaf sundew — 24 images
Dryopteris carthusiana (Vill.) H. P. Fuchs ( = spinulosa (O.F.Mueller) Watt) — spinulose wood fern — 18 images
Dryopteris clintoniana (D.C. Eaton ex A. Gray) Dowell — Clinton's wood fern — 1 image
Dryopteris cristata (L.) A. Gray — crested wood fern — 17 images
Dryopteris intermedia (Muhl. ex Willd.) A. Gray — intermediate wood fern — 20 images
Dryopteris marginalis (L.) A. Gray — marginal wood fern — 24 images
Duchesnea indica (Andr.) Focke — Indian strawberry — 10 images
Dulichium arundinaceum (L.) Britton — three-way sedge — 17 images
Echinochloa crus-galli (L.) Beauv. — barnyard grass — 11 images
Echinochloa frumentacea (Roxb.) Link ( = Echinochloa crus-galli var. frumentacea (Link) W.F.Wight) — Japanese millet — 3 images
Echinochloa walterii (Pursh) Heller — Walter's cockspur — 14 images
Echinocystis lobata (Michaux) Torrey et Gray — wild cucumber, prickly cucumber — 8 images
Echium creticum L. ( = Echium australe Lam.) — Cretian viper's bugloss — 8 images
Echium vulgare L. — common viper's bugloss, blue weed — 3 images
Egeria densa Planchon — Brazilian waterweed, Brazilian elodea — 4 images
Elaeagnus angustifolia L. — Russian olive, oleaster, silverberry — 4 images
Elaeagnus umbellata Thunb. — autumn olive, oleaster — 32 images
Eleocharis acicularis (L.) Roemer et Schultes — needle spike-rush — 28 images
Eleocharis elliptica Kunth — orange-fruited spike-rush — 3 images
Eleocharis flavescens var. olivacea (Torrey) Gleason ( = olivacea Torrey) — olive spike-rush — 19 images
Eleocharis melanocarpa Torrey — black-fruited spike-rush — 36 images
Eleocharis obtusa (Willd.) J.A. Schultes — soft-stemmed spike-rush — 40 images
Eleocharis obtusa var. ellipsoidalis Fern. — soft-stemmed spike-rush — 10 images
Eleocharis obtusa var. jejuna Fern. — soft-stemmed spike-rush — 2 images
Eleocharis palustris (L.) Roem. et Schultes — creeping spike-rush — 7 images
Eleocharis parvula (R. et S.) Link ex. Bluff, Nees et Schauer — dwarf spike-rush — 7 images
Eleocharis robbinsii Oakes — Robbins' spike-rush — 41 images
Eleocharis rostellata (Torrey) Torrey — saltmarsh spikerush, beaked spikerush — 20 images
Eleocharis tenuis (Willd.) Schultes — slender spike-rush — 1 image
Eleocharis tuberculosa (Michaux) Roemer et Schultes — tubercled spike-rush — 14 images
Eleocharis uniglumis (Link) Schultes ( = halophila Fern. et Brack.) — saline spike-rush, one-glumed spike-rush — 16 images
Eleusine indica (L.) Gaertner — goose grass, yard grass — 7 images
Eleutherococcus pentaphyllus (Sieb. et Zucc.) Nakai ( = Aralia pentaphylla Sieb. et Zucc.) — five-leaved aralia — 4 images
Elodea canadensis Michaux — northern waterweed — 7 images
Elymus trachycaulus ssp. glaucus (Pease et Moore) Cody ( = Agropyron trachycaulon var. glaucum (Pease et Moore) Malte) — 3 images
Elymus virginicus L. — wild rye — 13 images
Elymus virginicus var. halophilus (Bickn.) Wieg. — saltmarsh wild rye — 11 images
Elytrigia pungens (Pers.) Tutin ( = Agropyron littorale (Host) Dur.) — seabeach quack-grass — 2 images
Epifagus virginiana (L.) W.P.C. Barton — beech-drops — 14 images
Epigaea repens L. — trailing arbutus, mayflower — 37 images
Epilobium angustifolium L. ( = Chamerion angustifolium (L.) Holub) — great willowherb — 4 images
Epilobium ciliatum Raf. — American willowherb — 14 images
Epilobium coloratum Biehler — eastern willowherb, purple-leaved willowherb — 3 images
Epilobium leptophyllum Raf. — narrow-leaved willowherb — 2 images
Epipactis helleborine (L.) Crantz — helleborine — 18 images
Equisetum arvense L. — field horsetail, common horsetail — 21 images
Equisetum fluviatile L. — river horsetail — 22 images
Equisetum hyemale L. — scouring-rush — 10 images
Equisetum pratense Ehrh. — meadow horsetail — 3 images
Equisetum sylvaticum L. — woodland horsetail — 3 images
Equisetum variegatum Schleicher ex Weber et Mohr — variegated scouring rush — 5 images
Equisetum x litorale Kuhl. ex Rupr. ( = arvense x fluviatile ) — shore horsetail — 7 images
Eragrostis curvula (Schrader) Nees — weeping lovegrass — 3 images
Eragrostis pectinacea (Michaux) Nees — tufted lovegrass — 11 images
Eragrostis pilosa (L.) Beauv. — India lovegrass — 2 images
Eragrostis spectabilis (Pursh) Steudel — purple lovegrass — 14 images
Erechtites hieracifolius (L.) Raf. ex DC. — fireweed, pilewort — 23 images
Erechtites hieracifolius var. megalocarpus (Fern.) Cronq. ( = Erechtites megalocarpus Fern.) — seaside pilewort — 1 image
Erigeron annuus (L.) Pers. — eastern daisy fleabane — 9 images
Erigeron philadelphicus L. — Philadelphia fleabane — 5 images
Erigeron strigosus Muhl. — rough fleabane — 6 images
Erigeron strigosus var. discoideus Robbins — 3 images
Eriocaulon aquaticum (Hill) Druce ( = septangulare With.) — pipewort, white buttons — 28 images
Eriophorum virginicum L. — Virginia cotton-grass — 12 images
Erodium cicutarium (L.) L'Her. ex Aiton — 3 images
Erysimum cheiranthoides L. — wormseed mustard — 7 images
Erysimum x marshalli (Henfr.) Bois. — wallflower (garden hybrid, parentage uncertain) — 4 images
Erythronium americanum Ker-Gawler — trout-lily — 17 images
Euonymus alata (Thunb.) Sieb. — winged spindletree, burning bush — 16 images
Euonymus europaea L. — European spindletree — 10 images
Euonymus fortunei (Turcz.) Hand.-Maz. — winter creeper — 7 images
Euonymus sachalinensis (Fr. Schmidt) Maxim. — Sakhalin spindletree — 12 images
Euonymus sieboldiana Blume — Siebold's euonymus — 7 images
Eupatorium dubium Willd. ex Poiret ( = Eutrochium dubium (Willd. ex Poir.) E.E. Lamont) — Atlantic Joe-Pye-weed — 22 images
Eupatorium fistulosum Barratt ( = Eutrochium fistulosum (Barratt) E.E. Lamont) — hollow-stemmed Joe-Pye-weed — 17 images
Eupatorium hyssopifolium L. — hyssop-leaved boneset — 13 images
Eupatorium maculatum L. ( = Eutrochium maculatum (L.) E.E. Lamont) — spotted Joe-Pye-weed — 10 images
Eupatorium novae-angliae V.I. Sullivan ( = leucolepis var. novae-angliae Fernald) — New England boneset, pondshore boneset — 8 images
Eupatorium perfoliatum L. — boneset, thoroughwort — 26 images
Eupatorium pilosum Walter ( = rotundifolium var. saundersii (Porter) Cronq.) — rough boneset, verbena boneset — 25 images
Eupatorium purpureum L. ( = Eutrochium purpureum (L.) E.E. Lamont) — sweet Joe-Pye-weed — 9 images
Eupatorium rotundifolium var. ovatum (Bigelow) Torrey ( = pubescens Muhl. ex Willd.) — hairy boneset — 3 images
Euphorbia cyparissias L. — cypress spurge — 10 images
Euphorbia esula L. — wolf's milk — 9 images
Euphorbia maculata L. ( = Chamaesyce maculata (L.) Small, supina Raf.) — spotted spurge — 18 images
Euphorbia polygonifolia L. ( = Chamaecyce polygonifolia (L.) Small) — seaside spurge — 16 images
Euthamia caroliniana (L.) Greene ex Port. et Britt. ( = Solidago tenuifolia Pursh) — coastal plain slender goldenrod — 17 images
Euthamia graminifolia (L.) Nutt. ( = Solidago graminifolia (L.) Salisb.) — common flat-topped goldenrod — 9 images
Fagus grandifolia Ehrh. — American beech — 35 images
Fagus sylvatica L. — European beech — 6 images
Festuca arundinacea Schreber — tall fescue — 4 images
Festuca filiformis Pourret — hair fescue — 8 images
Festuca rubra L. — red fescue — 2 images
Fimbristylis autumnalis (L.) Roemer et Schultes — northern fimbry — 11 images
Forsythia intermedia Zabel — border forsythia — 14 images
Forsythia suspensa (Thunb.) Vahl. — weeping forsythia, golden bell — 7 images
Forsythia viridissima Lindl. — forsythia — 9 images
Fragaria vesca L. — strawberry — 3 images
Fragaria virginiana Duchesne — wild strawberry — 11 images
Fragaria x ananasa Duchesne ( = chiloensis x F. virginiana ) — garden strawberry — 3 images
Fraxinus americana L. — white ash — 36 images
Fraxinus nigra Marshall — black ash — 20 images
Fraxinus pennsylvanica Marsh. — green ash — 19 images
Froelichia gracilis (Hooker) Moq. — slender cottonweed — 17 images
Fuirena pumila (Torrey) Sprengel — annual umbrella-sedge — 29 images
Fumaria officinalis L. — fumitory — 5 images
Gaillardia x grandiflora (G. aristata x G. pulchella) — blanket flower — 1 image
Galeopsis bifida Boenn. — cleft hempnettle — 8 images
Galinsoga parviflora Cav. — quickweed, gallant soldiers — 2 images
Galinsoga quadriradiata Ruiz et Pavon ( = ciliata (Raf.) Blake) — hairy quickweed — 8 images
Galium aparine L. — cleavers — 10 images
Galium asprellum L. — rough bedstraw — 4 images
Galium brevipes Fern. et Wiegand ( = trifidum ssp. brevipes A. et D. Love) — short-stalked bedstraw — 4 images
Galium circaezans Michaux — wild licorice — 13 images
Galium lanceolatum Torrey — wild licorice — 7 images
Galium mollugo L. — white bedstraw — 17 images
Galium obtusum Bigelow — blunt-leaved bedstraw or large marsh bedstraw — 4 images
Galium odoratum (L.) Scop. ( = Asperula odorata L.) — sweet woodruff — 3 images
Galium palustre L. — common marsh bedstraw — 4 images
Galium pilosum Aiton — hairy bedstraw — 16 images
Galium tinctorium (L.) Scop. — Clayton's bedstraw — 21 images
Galium triflorum Michaux — woodland bedstraw — 8 images
Gaultheria hispidula (L.) Muhl. ex Bigelow ( = Chiogenes hispidula (L.) Torrey and A. Gray) — creeping snowberry — 9 images
Gaultheria procumbens L. — wintergreen, checkerberry, eastern teaberry — 25 images
Gaylussacia baccata (Wangenh.) K. Koch — black huckleberry — 27 images
Gaylussacia dumosa var. bigelowiana Fern. ( = bigelowiana (Fern.) Sorrie et Weakley) — bog huckleberry — 10 images
Gaylussacia frondosa (L.) Torr. et Gray ex Torr. — blue huckleberry, dangleberry — 19 images
Genista tinctoria L. — dyer's greenwed — 2 images
Gentianopsis crinita (Froel.) Y.C. Ma ( = Gentiana crinita Froel.) — fringed gentian — 5 images
Geranium carolinianum L. — Carolina geranium — 3 images
Geranium maculatum L. — wild geranium — 13 images
Geranium robertianum L. — Robert geranium — 12 images
Geranium thunbergii Sieb. et Zucc. ex Lindl. et Paxton ( = Geranium ibericum Cav.) — dewdrop crane's bill — 13 images
Geum canadense Jacq. — white avens — 12 images
Geum laciniatum Murray — rough avens, floodplain avens — 15 images
Geum urbanum L. — city avens — 9 images
Geum virginianum L. — cream-colored avens — 1 image
Glaucium flavum Crantz — yellow hornpoppy — 5 images
Glaux maritima L. ( = Lysimachia maritima (L.) Galasso, Banfi et Soldano) — sea milkwort — 5 images
Glechoma hederacea L. — ground-ivy — 12 images
Gleditsia triacanthos L. — honey-locust — 12 images
Glyceria canadensis (Michaux) Trin. — rattlesnake grass — 9 images
Glyceria obtusa (Muhl.) Trin. — coastal mannagrass — 12 images
Glyceria striata (Lam.) A. S. Hitche — fowlmeadow grass — 6 images
Gnaphalium obtusifolium L. ( = Pseudognaphalium obtusifolium (L.) Hilliard et Burtt) — sweet everlasting, fragrant cudweed — 15 images
Gnaphalium uliginosum L. — low cudweed — 5 images
Goodyera pubescens (Willd.) R. Br. — downy rattlesnake-plantain — 13 images
Goodyera tesselata Lodd. — checkered rattlesnake-plantain — 18 images
Gratiola aurea Pursh — golden hedgehyssop — 29 images
Gratiola neglecta Torrey — mud hedgehyssop — 7 images
Gymnocarpium dryopteris — oak fern — 3 images
Gypsophila elegans Bieb. — Caucasus gypsophila — 2 images
Halesia carolina L. — Carolina silverbell — 5 images
Hamamelis virginiana L. — witch-hazel — 33 images
Hedera helix L. — English ivy, European ivy — 9 images
Hedera hibernica (G. Kirchn.) Bean — Atlantic ivy — 8 images
Helenium flexuosum Raf. ( = nudiflorum Nutt.) — winged sneezeweed — 6 images
Helianthemum bicknellii Fernald ( = Crocanthemum bicknellii (Fern.) Barnh.) — hoary rockrose — 20 images
Helianthemum canadense (L.) Michx. ( = Crocanthemum canadense (L.) Britton) — longbranch frostweed — 37 images
Helianthemum dumosum (Bicknell) Fern. ( = Crocanthemum dumosum Bicknell) — bushy rockrose — 17 images
Helianthemum propinquum Bicknell ( = Crocanthemum propinquum (Bicknell) Bicknell) — low frostweed, low rockrose — 25 images
Helianthus annuus L. — common sunflower, mirasol — 3 images
Helianthus divaricatus L. — woodland sunflower — 15 images
Helianthus tuberosus L. — Jerisalem artichoke — 3 images
Heliopsis helianthoides (L.) Sweet — false sunflower — 7 images
Hemerocallis fulva (L.) L. — orange daylily — 8 images
Hepatica nobilis var. acuta (Pursh) Steyermark ( = Anemone acutiloba (DC.) G. Lawson) — sharp-lobed liverleaf — 2 images
Hepatica nobilis var. obtusa (Pursh) Steyermark ( = Anemone americana (DC.) H. Hara) — blunt-lobed liverleaf — 17 images
Heracleum maximum Bartram ( = lanatum Michaux) — cow parsnip — 36 images
Hesperis matronalis L. — dame's rocket — 13 images
Hibiscus moscheutos L. ( = palustris L.) — swamp mallow — 15 images
Hieracium aurantiacum L. — orange hawkweed — 7 images
Hieracium flagellare Willd. — whip hawkweed — 6 images
Hieracium gronovii L. — Gronovius' hawkweed — 16 images
Hieracium lachenalii K.C. Gmelin ( = vulgatum Fries) — European hawkweed — 6 images
Hieracium paniculatum L. — woodland hawkweed — 15 images
Hieracium pilosella L. — mouse-ear hawkweed — 5 images
Hieracium piloselloides Vill. ( = florentinum All.) — smooth hawkweed — 3 images
Hieracium pratense Tausch ( = H. caespitosum Dumort.) — king-devil, meadow hawkweed — 17 images
Hieracium sabaudum L. ( = canadense hort. Goett ex Froel.) — Savoy hawkweed, Canada hawkweed — 11 images
Hieracium scabrum Michaux — rough hawkweed — 15 images
Hieracium venosum L. — rattlesnake weed — 4 images
Hierochloe odorata (L.) Beauv. ( = Anthoxanthum nitens (Weber) Y.Schouten et Veldcamp) — Indian sweetgrass — 8 images
Holcus lanatus L. — velvet grass — 13 images
Holosteum umbellatum L. — jagged chickweed — 18 images
Honckenya peploides ssp. robusta (Fern.) Hulten — seabeach sandwort — 20 images
Hordeum leporinum Link ( = murinum ssp. leporinum ) — wild barley — 7 images
Hosta sp. — hosta — 3 images
Hottonia inflata Ell. — featherfoil — 7 images
Houstonia caerulea L. ( = Hedeyotis caerulea (L.) Hooker) — bluets — 26 images
Hudsonia ericoides L. — pinebarren golden heather — 33 images
Hudsonia tomentosa Nutt. — woolly beach heather — 24 images
Humulus japonicus Sieb. et Zucc. — Japanese hop — 5 images
Humulus lupulus L. — common hop — 4 images
Huperzia lucidula (Michaux) Trev. — shining clubmoss — 11 images
Hydrocotyle americana L. — swamp pennywort, woodland pennywort — 13 images
Hydrocotyle umbellata L. — pondshore pennywort — 8 images
Hydrocotyle verticillata Thunb. — saltpond pennywort — 3 images
Hypericum boreale f. callitrichoides Fassett — northern dwarf St. John's-wort submersed form — 9 images
Hypericum canadense L. — Canadian St. John's-wort — 12 images
Hypericum ellipticum Hooker — pale St. John's-wort — 16 images
Hypericum gentianoides (L.) B.S.P. — orange grass, pineweed — 19 images
Hypericum perforatum L. — common St. John's-wort — 9 images
Hypericum punctatum Lam. — spotted St. John's-wort — 12 images
Hypericum sp. — 3 images
Hypochaeris radicata L. — hairy cat's-ear — 33 images
Hypoxis hirsuta (L.) Cov. — yellow stargrass — 10 images
Hyssopus officinalis L. — hyssop — 2 images
Hystrix patula Moench ( = Elymus hystrix L.) — bottlebrush grass — 8 images
Ilex crenata Thunb. — Japanese holly — 10 images
Ilex glabra (L.) Gray — inkberry — 20 images
Ilex opaca Ait. — American holly — 38 images
Ilex verticillata (L.) Gray — common winterberry — 28 images
Impatiens capensis Meerb. — jewelweed — 12 images
Ionactis linariifolia (L.) Greene ( = Aster linariifolius L.) — stiff aster, spruce aster — 24 images
Iris pseudacorus L. — yellow iris — 18 images
Iris sibirica L. — Siberian iris — 2 images
Iris versicolor L. — northern blueflag — 30 images
Isoetes sp. — quillwort — 3 images
Isotria verticillata (Willd.) Raf. — large whorled pogonia — 9 images
Iva frutescens ssp. oraria (Bartlett) R.C. Jackson — hightide bush, saltmarsh-elder — 24 images
Jasione montana L. — sheep's bit — 20 images
Juglans cinerea L. — butternut — 10 images
Juglans nigra L. — black walnut — 9 images
Juncus bufonius L. — toad rush — 5 images
Juncus canadensis Gay ex LaHarpe — marsh or Canada rush — 22 images
Juncus effusus L. — common rush — 12 images
Juncus gerardii Loisel — saltmarsh rush — 9 images
Juncus greenei Oakes et Tuckerman — Greene's rush — 13 images
Juncus marginatus Rostk. — grassleaf rush — 7 images
Juncus militaris Bigelow — bayonet rush — 32 images
Juncus pelocarpus E. Meyer — pondshore rush — 26 images
Juncus secundus Beauv. ex Poiret — secund rush — 5 images
Juncus tenuis Willd. — path rush, yard rush — 7 images
Juniperus communis var. depressa Pursh — common juniper, pasture juniper — 29 images
Juniperus conferta Parl. — shore juniper — 28 images
Juniperus horizontalis Moensch — prostrate or creeping juniper — 8 images
Juniperus virginiana L. — eastern red cedar — 68 images
Kalmia angustifolia L. — sheep laurel — 26 images
Kalmia latifolia L. — mountain laurel — 28 images
Kalmia polifolia Wangenh. — bog laurel — 2 images
Kalopanax septemlobus Koidzumi ( = K. pictus (Thunb.) Nakai) — castor aralia — 11 images
Kochia scoparia (L.) Schrader — summer-cypress — 11 images
Krigia virginica (L.) Willd. — dwarf dandelion — 26 images
Lachnanthes caroliniana (Lam.) Dandy — redroot — 18 images
Lactuca biennis (Moench) Fern. — wild blue lettuce — 11 images
Lactuca canadensis L. — yellow wild lettuce — 19 images
Lactuca serriola L. — prickly lettuce — 23 images
Lamium amplexicaule L. — henbit — 5 images
Lamium purpureum L. — purple deadnettle — 9 images
Lapsana communis L. — nipplewort — 13 images
Larix decidua P. Miller — European larch — 16 images
Larix laricina (DuRoi) K. Koch — tamarack, American larch — 13 images
Larix sp. — 3 images
Lathyrus japonicus var. maritimus (L.) Kartesz et Gandhi — beach pea — 14 images
Lathyrus latifolius L. — perennial pea — 2 images
Lathyrus sylvestris L. — flat pea — 5 images
Lechea intermedia Leggett ex Britt. — largepod pinweed — 21 images
Lechea maritima Leggett ex B.S.P. — beach pinweed — 64 images
Lechea minor L. — thyme-leaf pinweed — 20 images
Lechea mucronata Raf. ( = villosa Ell.) — hairy pinweed — 45 images
Lechea pulchella var. pulchella Raf. ( = leggettii Britton et Hollick) — Leggett's pinweed — 4 images
Lechea tenuifolia Michaux — slender pinweed — 17 images
Leersia oryzoides (L.) Sw. — rice cutgrass — 31 images
Leersia virginica Willd. — white cutgrass — 3 images
Lemna minor L. — duckweed — 4 images
Lemna valdiviana Phil. — American duckweed — 2 images
Leontodon autumnalis L. ( = Scorzoneroides autumnalis (L.) Moench) — fall dandelion — 10 images
Leonurus cardiaca L. — motherwort — 4 images
Lepidium campestre (L.) Aiton f. — field cress, cow cress — 7 images
Lepidium densiflorum Schrader — common pepperweed — 1 image
Lepidium latifolium L. — broad-leaved peppergrass — 8 images
Lepidium virginicum L. — Virginia pepperweed — 25 images
Lespedeza angustifolia (Pursh) Ell. — narrow-leaved bush-clover — 13 images
Lespedeza capitata Michx. — round-headed bush-clover — 11 images
Lespedeza cuneata (Dum.-Cours.) G.Don — Chinese bush-clover — 15 images
Lespedeza frutescens (L.) Hornem. ( = violacea auct., non (L.) Pers.) — violet bush-clover — 4 images
Lespedeza hirta (L.) Hornem. — hairy bush-clover — 8 images
Lespedeza stuevei Nutt. — Stueve's bush-clover — 4 images
Lespedeza thunbergii ssp. formosa (Nakai) H. Ohashi — tall bush-clover — 25 images
Lespedeza violacea (L.) Pers. ( = intermedia (S. Wats.) Britt.) — wand bush-clover — 16 images
Lespedeza virginica (L.) Britton — slender bush-clover — 8 images
Leucanthemum vulgare Lam. — oxeye daisy — 8 images
Leucothoe fontanesiana (Steudel) Sleumer — dog-hobble, drooping fetterbush — 5 images
Leucothoe racemosa (L.) Gray ( = Eubotrys racemosa (L.) Nutt.) — swamp sweetbells — 22 images
Liatris novae-angliae (Lunell) Shinners ( = scariosa var. novae-angliae (Lunell) Gandhi, S.M. Young et P. Somers) — New England blazingstar — 21 images
Ligusticum scothicum L. — scotch, sea-lovage — 4 images
Ligustrum obtusifolium Sieb. et Zucc. — Japanese privet, ibota privet — 16 images
Ligustrum ovalifolium Hassk. — California privet — 6 images
Lilium canadense L. — Canada lily, wild yellow lily — 17 images
Lilium lancifolium Thunb. ( = tigrinum Ker.) — tiger lily — 3 images
Lilium philadelphicum L. — wood lily — 26 images
Lilium superbum L. — Turk's cap lily — 3 images
Limonium carolinianum (Walt.) Britt. — sea lavender — 24 images
Linaria vulgaris P. Miller — butter-and-eggs — 7 images
Lindera benzoin (L.) Blume — spicebush — 34 images
Lindernia dubia (L.) Pennell — false pimpernel — 12 images
Linnaea borealis L. — twinflower — 8 images
Linum intercursum Bicknell — sandplain flax — 12 images
Linum usitatissimum L. — common flax — 8 images
Linum virginianum L. — Virginia yellow flax — 14 images
Liquidambar styraciflua L. — sweetgum — 11 images
Liriodendron tulipifera L. — tuliptree — 13 images
Lobelia cardinalis L. — cardinalflower — 19 images
Lobelia dortmanna L. — water lobelia — 13 images
Lobelia inflata L. — Indian tobacco — 18 images
Lobelia siphilitica L. — great blue lobelia — 2 images
Lobularia maritima (L.) Desv. — sweet alyssum — 1 image
Lolium multiflorum Lam. — Italian ryegrass — 3 images
Lolium perenne L. — perennial rye grass — 11 images
Lonicera japonica Thunb. — Japanese honeysuckle — 20 images
Lonicera maackii (Rupr.) Maxim. — Amur honeysuckle — 18 images
Lonicera morrowii A. Gray — Morrow's honeysuckle — 30 images
Lonicera sempervirens L. — trumpet honeysuckle — 8 images
Lonicera x bella Zabel ( = morrowii x tatarica ) — whitebell honeysuckle — 13 images
Lotus corniculatus L. — birdfoot-trefoil — 8 images
Ludwigia alternifolia L. — seedbox, squarepod — 16 images
Ludwigia palustris (L.) Ell. — water purslane, mud loosestrife — 19 images
Ludwigia sphaerocarpa Elliott — round-fruited seedbox — 7 images
Lunaria annua L. — annual honesty — 11 images
Lupinus perennis L. — wild lupine — 11 images
Lupinus polyphyllus Lindley — garden lupine, Washington lupine — 9 images
Luzula multiflora (Retz.) Lej. — common woodrush — 18 images
Lychnis flos-cuculi L. — ragged robin — 6 images
Lycopodiella appressa (Chapman) Cranfill ( = Lycopodium appressum (Chapman) Lloyd et Underwood) — southern bog clubmoss — 11 images
Lycopodiella appressa x inundata ( = x gilmanii A. Haines) — hybrid bog clubmoss — 3 images
Lycopodiella inundata (L.) Holub ( = Lycopodium inundatum L.) — northern bog clubmoss — 12 images
Lycopodium annotinum L. ( = Spinulum annotinum (L.) A. Haines) — stiff clubmoss — 7 images
Lycopodium clavatum L. — running clubmoss, common clubmoss — 9 images
Lycopodium hickeyi W.L. Wagner, Beitel et Moran ( = Dendrolycopodium hickeyi (Wagner, Beitel et Moran) A. Haines) — Hickey's clubmoss — 6 images
Lycopodium obscurum L. ( = Dendrolycopodium obscurum (L.) A. Haines) — princess-pine or tree clubmoss — 19 images
Lycopus americanus Muhl. ex W. Barton — American water-horehound — 10 images
Lycopus amplectens Raf. — pondshore water-horehound, sessile water-horehound — 13 images
Lycopus europaeus L. — European water horehound — 1 image
Lycopus uniflorus Michaux — tuberous water-horehound — 40 images
Lycopus virginicus L. — Virginia water-horehound, floodplain water-horehound — 16 images
Lygodium palmatum (Bernh. ex Schrader) Sw. — climbing fern — 13 images
Lyonia ligustrina (L.) DC. — maleberry — 39 images
Lysimachia ciliata L. — fringed loosestrife — 3 images
Lysimachia clethroides Duby in DC. — gooseneck loosestrife — 1 image
Lysimachia hybrida Michaux — narrow-leaved loosestrife — 11 images
Lysimachia nummularia L. — creeping jenny, moneywort — 4 images
Lysimachia quadrifolia L. — whorled loosestrife — 12 images
Lysimachia terrestris (L.) B.S.P. — swamp candles — 13 images
Lysimachia thyrsiflora L. — tufted loosestrife — 9 images
Lythrum salicaria L. — purple loosestrife — 17 images
Lythrum virgatum L. — wand-loosestrife — 5 images
Magnolia virginiana L. — sweetbay magnolia — 13 images
Maianthemum canadense Desf. — Canada mayflower — 9 images
Malus baccata (L.) Borkh. — Siberian crabapple — 7 images
Malus floribunda Sieb. ex Van Houtte — Japanese flowering crabapple — 5 images
Malus pumila P. Miller — apple — 3 images
Malus sieboldii (Regel) Rehder — Toringo crabapple — 9 images
Malva moschata L. — musk mallow — 4 images
Malva neglecta Wallr. — cheeses — 5 images
Marsilea quadrifolia L. — water-clover — 7 images
Matricaria discoidea DC. ( = matricarioides auct. ) — pineapple weed — 3 images
Matteuccia struthiopteris (L.) Todaro — ostrich fern — 19 images
Medeola virginiana L. — Indian cucumber-root — 22 images
Medicago lupulina L. — black medick — 5 images
Medicago sativa L. — lucerne, blue alfalfa — 3 images
Melampyrum lineare Desr. — cowwheat — 9 images
Melilotus albus Medicus — white sweetclover — 5 images
Melilotus officinalis (L.) Lam. — yellow sweetclover — 4 images
Melissa officinalis L. — lemon balm — 16 images
Mentha canadensis L. ( = arvensis var. villosa (Benth.) S.R. Stewart) — American field mint — 6 images
Mentha sp. — 4 images
Mentha x piperita L. — peppermint — 4 images
Mentha x villosa Hudson — woolly mint (M. spicata x M. suaveolens) — 3 images
Menyanthes trifoliata L. — bogbeans — 7 images
Mikania scandens (L.) Willd. — climbing hempvine — 16 images
Mimulus ringens L. — long-stalked monkey-flower — 10 images
Mirabilis nyctaginea (Michaux) MacMillan — four-o'clock — 10 images
Mitchella repens L. — partridgeberry — 14 images
Mitella diphylla L. — twoleaf miterwort, coolwort — 1 image
Moehringia lateriflora (L.) Fenzl ( = Arenaria lateriflora L.) — grove sandwort — 6 images
Mollugo verticillata L. — carpetweed — 13 images
Monotropa hypopitys L. ( = Hypopitys monotropa Crantz) — pinesap, false beechdrops — 20 images
Monotropa uniflora L. — Indian pipe — 15 images
Morus alba L. — white mulberry — 8 images
Muhlenbergia schreberi J.F. Gmelin — nimblewill — 2 images
Muhlenbergia sobolifera (Muhl. ex Willd.) Trin. — awnless woodland-muhly — 1 image
Muhlenbergia uniflora (Muhl.) Fern. — pondshore muhly — 19 images
Myosotis laxa Lehm. — bay forget-me-not — 5 images
Myosotis stricta Link ex Roemer et J.A. Schultes — blue scorpion-grass — 4 images
Myrica gale L. — sweet gale — 20 images
Myrica pensylvanica Loisel. ( = Morella pensylvanica (Mirbel) Kartesz) — bayberry — 32 images
Myriophyllum heterophyllum Michaux — variable watermilfoil — 13 images
Myriophyllum humile (Raf.) Morong — lowly watermilfoil — 25 images
Myriophyllum spicatum L. — Eurasian watermilfoil — 7 images
Najas gracillima (A. Braun) Magnus — slender waternymph — 2 images
Nasturtium officinale Ait. f. ( = Rorippa nasturtium-aquaticum (L.) Hayek) — watercress — 10 images
Nemopanthus mucronatus (L.) Loes. ( = Ilex mucronata (L.) M. Powell, Savol. et S. Andrews) — catberry — 40 images
Nepeta cataria L. — catnip — 1 image
Nuphar variegata Durand ex Clinton — yellow waterlily, spatterdock — 17 images
Nuttallanthus canadensis (L.) D.A. Sutton ( = Linaria canadensis (L.) Chaz.) — blue toadflax, old-field toadflax — 29 images
Nymphaea odorata Ait. — American white waterlily, fragrant waterlily — 19 images
Nymphoides cordata (Ell.) Fern. — floating heart — 15 images
Nyssa sylvatica Marshall — tupelo, black gum — 75 images
Oenothera biennis L. — common evening primrose — 31 images
Onoclea sensibilis L. — sensitive fern — 24 images
Ornithogalum umbellatum L. — star-of-Bethlehem — 4 images
Orobanche uniflora L. — one-flowered cancer-root — 4 images
Oryzopsis asperifolia Michaux — spreading ricegrass — 15 images
Oryzopsis pungens (Torrey ex Spreng.) A. S. Hitchc. ( = Piptatherum pungens (Torr. ex Spreng.) Dom.) — little ricegrass — 3 images
Osmunda cinnamomea L. — cinnamon fern — 24 images
Osmunda claytoniana L. — interrupted fern — 17 images
Osmunda regalis L. — royal fern — 22 images
Ostrya virginiana (P. Mill.) K. Koch — eastern hop-hornbeam — 21 images
Oxalis corniculata L. ( = repens Thunberg) — creeping sorrel — 10 images
Oxalis dillenii Jacq. — showy yellow woodsorrel — 10 images
Oxalis stricta L. ( = europaea Jordan) — common yellow woodsorrel — 15 images
Oxalis violacea L. — violet woodsorrel — 4 images
Pachysandra terminalis Sieb. et Zucc. — Japanese spurge — 7 images
Panax trifolius L. — dwarf ginseng — 18 images
Panicum amarum ssp. amarulum (A.S. Hitchc. et Chase) Freckmann et Lelong ( = Panicum amarulum A.S. Hitchc. et Chase) — bitter panic grass — 11 images
Panicum capillare L. — witchgrass — 6 images
Panicum dichotomiflorum Michaux — fall panic-grass — 22 images
Panicum rigidulum Bosc ex Nees ( = Coleataenia longifolia ssp. rigidula (Bosc ex Nees) Soreng) — flat-stemmed panic-grass — 12 images
Panicum verrucosum Muhl. — Warty panic-grass — 21 images
Panicum virgatum L. — switchgrass — 28 images
Parthenocissus inserta (Kerner) Fritsch ( = vitacea (Knerr) A.C. Hitchc.) — thicket creeper, grape woodbine — 2 images
Parthenocissus quinquefolia (L.) Planchon — Virginia creeper — 27 images
Parthenocissus tricuspidata (Zieb. et Zucc.) Planchon — Boston ivy — 7 images
Pascopyrum smithii (Rydb.) A. Love ( = Agropyron smithii Rydb.) — western wheatgrass — 5 images
Paspalum setaceum var. muhlenbergii (Nash) D. Banks ( = Paspalum ciliatifolium var. muhlenbergii (Nash) Fern.) — Muhlenberg's bead-grass — 12 images
Pastinaca sativa L. — wild parsnip — 8 images
Pedicularis canadensis L. — wood-betony, Canadian lousewort, common lousewort — 8 images
Peltandra virginica (L.) Schott — arrow-arum — 12 images
Penthorum sedoides L. — ditch stonecrop — 7 images
Petasites hybridus (L.) Gaertner, B. Meyer et Scherb. — butterbur — 10 images
Petasites japonicus (Sieb. et Zucc.) Maxim. — 6 images
Phalaris arundinacea L. — reed canarygrass — 23 images
Phaseolus vulgaris L. — green bean — 5 images
Phegopteris connectilis (Michaux) Watt ( = Thelypteris phegopteris (L.) Slosson) — narrow beech fern — 11 images
Phegopteris hexagonoptera (Michaux) Fée — broad beech fern — 5 images
Phellodendron amurense Rupr. — Amur corktree — 21 images
Phellodendron chinense Schneider — Chinese corktree — 2 images
Phellodendron sachalinense (Fr. Schmidt) Sarg. — Sakhalin corktree — 18 images
Phleum pratense L. — timothy — 14 images
Phragmites altissimus (Benth.) Mabille ( = australis ssp. altissimus (Benth.) Clayton) — 10 images
Phragmites australis (Cav.) Trin. ex Steudel — common reed — 35 images
Phragmites australis ssp. americanus Saltonstall, P.M. Peterson et Soreng — 16 images
Phragmites sp. ( = australis, or americanus, or hybrid ) — 17 images
Physalis alkekengi L. — Chinese lantern plant — 5 images
Physostegia virginiana (L.) Bentham — false dragonhead — 4 images
Phytolacca americana L. — pokeweed — 15 images
Picea abies (L.) Karst. — Norway spruce — 36 images
Picea glauca (Moench) Voss — white spruce — 26 images
Picea mariana (P. Miller) B.S.P. — black spruce — 31 images
Picea pungens Engelm. — blue pruce — 6 images
Picea rubens Sarg. — red spruce — 16 images
Pieris japonica (Thunb.) D. Don — Japanese andromeda — 5 images
Pilea pumila (L.) A. Gray — clearweed, richweed — 12 images
Pinus banksiana Lamb. — Jack pine — 9 images
Pinus nigra Arnold — Austrian pine — 9 images
Pinus resinosa Ait. — red pine — 17 images
Pinus rigida P. Mill. — pitch pine — 89 images
Pinus strobus L. — white pine — 57 images
Pinus sylvestris L. — Scotch pine — 15 images
Pinus thunbergii Parl. ( = thunbergiana Franco) — Japanese black pine — 15 images
Piptochaetium avenaceum (L.) Parodi ( = Stipa avenacea L.) — black oatgrass — 18 images
Pistia stratiotes L. — water lettuce — 3 images
Pityopsis falcata (Pursh) Nutt. ( = Chrysopsis falcata (Pursh) Ell.) — sickle-leaved golden aster — 27 images
Plantago aristata Michaux — bracted plantain — 13 images
Plantago lanceolata L. — narrow-leaved plantain, English plantain — 7 images
Plantago major L. — common plantain, white man's foot — 8 images
Plantago maritima var. juncoides (Lam.)A.Gray — seaside plantain — 13 images
Platanthera blephariglottis (Willd.) Lindley ( = Habenaria blephariglottis (Willd.) Hooker) — white fringed orchid — 12 images
Platanthera clavellata (Michaux) Luer ( = Habenaria clavellata (Michaux) Sprengel) — green woodland orchid — 11 images
Platanthera grandiflora (Bigelow) Lindley ( = Habenaria fimbriata (Aiton) R. Br.) — large purple fringed orchid — 7 images
Platanthera lacera (Michx.) G. Don — ragged fringed orchid — 7 images
Platanus occidentalis L. — sycamore — 26 images
Pluchea odorata var. succulenta (Fern.) Cronq. — saltmarsh fleabane — 8 images
Poa annua L. — annual bluegrass — 16 images
Poa bulbosa L. — bulbous bluegrass — 11 images
Poa chapmaniana Scribner — Chapman's bluegrass — 4 images
Poa compressa L. — flat-stemmed bluegrass — 10 images
Poa nemoralis L. — woodland bluegrass — 5 images
Poa palustris L. — fowl-meadow grass — 6 images
Poa pratensis L. — June grass — 3 images
Poa trivialis L. — rough bluegrass — 5 images
Pogonia ophioglossoides (L.) Ker-Gawler — rose pogonia — 9 images
Polygala cruciata L. — cross-leaved milkwort — 21 images
Polygala nuttallii Torrey et A. Gray — Nuttall's milkwort — 13 images
Polygala paucifolia Willd. — fringed polygala, flowering wintergreen — 6 images
Polygala polygama Walter — racemed milkwort, bitter milkwort — 19 images
Polygala sanguinea L. — purple milkwort, common milkwort — 8 images
Polygala verticillata L. — whorled milkwort — 9 images
Polygonatum biflorum (Walter) Ell. — giant Solomon seal — 4 images
Polygonatum pubescens (Willd.) Pursh — Solomon's seal — 17 images
Polygonella articulata (L.) Meisner ( = Polygonum articulatum L.) — jointweed — 27 images
Polygonum amphibium var. emersum Michaux. ( = P. coccineum Muhl., Persicaria amphibia (L.) Gray) — erect water smartweed — 15 images
Polygonum arifolium L. ( = Persicaria arifolia (L.) Haroldson) — halberdleaf tearthumb — 12 images
Polygonum aviculare L. ( = arenastrum Jordan ex Boreau) — doorweed — 20 images
Polygonum careyi Olney ( = Persicaria careyi (Olney) Greene) — Carey's smartweed — 21 images
Polygonum cespitosum var. longisetum (deBruyn) A.N. Steward — Chinese smartweed — 18 images
Polygonum convolvulus L. ( = Fallopia convolvulus (L.) A. Love) — false buckwheat, black bindweed — 1 image
Polygonum cristatum Engelm. et A. Gray ( = Fallopia cristata (Engelm. et Gray) Holub) — winged bindweed — 10 images
Polygonum cuspidatum Sieb. et Zucc. ( = Fallopia japonica (Houtt.) L.P. Ronse Decraene, Reunoutria japonica Houtt.) — Japanese knotweed — 25 images
Polygonum cuspidatum var. compactum (Hook. f.) L.H. Bailey ( = compactum J. D. Hooker) — dwarf Japanese knotweed — 5 images
Polygonum glaucum Nutt. — seaside knotweed — 10 images
Polygonum hydropiperoides Michaux ( = Persicaria hydropiperoides (Michaux) Small) — false water-pepper — 12 images
Polygonum lapathifolium L. ( = Persicaria lapathifolia (L.) S.F. Gray) — nodding smartweed — 2 images
Polygonum pensylvanicum L. ( = Persicaria pensylvanica (L.) G. Maza) — pinkweed — 22 images
Polygonum perfoliatum L. ( = Persicaria perfoliata (L.) H. Gross) — mile-a-minute — 27 images
Polygonum persicaria L. ( = Persicaria maculosa (L.) S.F. Gray) — lady's thumb — 22 images
Polygonum polystachyum Wallich ex Meisner ( = Persicaria wallichii Greuter et Burdet, Reynoutria polystachya (Wallich ex Meisner) Moldenke) — Himalayan knotweed, garden smartweed — 13 images
Polygonum punctatum Ell. ( = Persicaria punctata (Ell.) Small) — dotted smartweed — 19 images
Polygonum puritanorum Fern. ( = Persicaria puritanorum (Fern.) Sojak) — pondshore smartweed — 6 images
Polygonum robustius (Small) Fern. ( = robustior (Small) Bicknell, punctatum var. majus (Meisner) Fassett) — big water-smartweed, coarse smartweed — 7 images
Polygonum sagittatum L. ( = Persicaria sagittata (L.) H. Gross) — arrowleaf tearthumb — 15 images
Polygonum scandens L. ( = Fallopia scandens (L.) Holub) — climbing false buckwheat — 18 images
Polygonum tenue Michaux — rock knotweed — 12 images
Polygonum virginianum ( = Tovara virginiana (L.) Raf., Persicaria virginiana (L.) Gaertner) — jumpseed — 9 images
Polygonum x bohemicum ( = Fallopia x bohemica (Chrtek et Chrtkova) J.P. Balley, P. cuspidatum x P. sachalinense ) — Bohemian knotweed — 14 images
Polypodium appalachianum Haufler et Windham — Appalachian polypody — 3 images
Polypodium virginianum L. — rockcap fern or common polypody — 13 images
Polystichum acrostichoides (Michaux) Schott — Christmas fern — 22 images
Pontederia cordata L. — pickerelweed — 13 images
Populus alba L. — white poplar — 7 images
Populus balsamifera L. — balsam poplar — 5 images
Populus deltoides Bartram ex Marsh. — eastern cottonwood — 14 images
Populus grandidentata Michaux — bigtooth aspen — 28 images
Populus heterophylla L. — swamp cottonwood — 4 images
Populus nigra L. — Lombardy poplar, black poplar — 13 images
Populus tremuloides Michaux — trembling aspen — 33 images
Populus x jackii Sarg. ( = balsamifera x deltoides ) — balm-of-Gilead — 1 image
Portulaca oleracea L. — common purslane — 10 images
Potamogeton amplifolius Tuckerman — big-leaved pondweed — 3 images
Potamogeton bicupulatus Fernald ( = capillaceus Poiret) — hairlike pondweed — 2 images
Potamogeton crispus L. — crispy or curly pondweed — 1 image
Potamogeton epihydrus Raf. — surface pondweed, ribbonleaf pondweed — 17 images
Potamogeton gramineus L. — grassleaf pondweed — 4 images
Potamogeton nodosus Poiret — long-leaved pondweed — 4 images
Potamogeton oakesianus Robbins — Oakes' pondweed — 13 images
Potamogeton pulcher Tuckerman — spotted pondweed — 2 images
Potamogeton sp. — 3 images
Potentilla argentea L. — silver cinquefoil — 6 images
Potentilla arguta Pursh ( = Drymocallis arguta (Pursh) Rydb.) — tall cinquefoil, glandular cinquefoil — 6 images
Potentilla canadensis L. — dwarf cinquefoil — 13 images
Potentilla egedii ssp. groenlandica (Tratt.) A. Loeve ( = Argentina egedii ssp. groenlandica (Tratt.) A. Loeve, anserina var. groenlandica Tratt.) — saltmarsh silverweed — 9 images
Potentilla fruticosa ssp. floribunda (Pursh) Elkington ( = Dasiphora floribunda Raf., Pentaphylloides floribunda (Pursh) A. Loeve) — 5 images
Potentilla norvegica L. — three-finger, strawberryweed — 10 images
Potentilla recta L. — sulphur cinquefoil — 10 images
Potentilla simplex Michaux — common cinquefoil — 5 images
Prenanthes altissima L. ( = Nabalus altissimus (L.) Hooker) — tall rattlesnake-root — 9 images
Prenanthes trifoliolata (Cass.) Fern. ( = Nabalus trifoliolatus Cass.) — tall rattlesnake-root, gall-of-the-earth — 16 images
Proserpinaca palustris L. — mermaid-weed — 16 images
Proserpinaca pectinata Lam. — cut-leaved mermaid-weed — 3 images
Prunella vulgaris ssp. lanceolata (W. Barton) Hulten — American heal-all — 2 images
Prunella vulgaris ssp. vulgaris L. — Eurasian heal-all — 7 images
Prunus avium (L.) L. — sweet cherry — 7 images
Prunus depressa Pursh — sand cherry — 7 images
Prunus mahaleb L. — mahaleb cherry — 3 images
Prunus maritima Marsh. — beach plum — 42 images
Prunus pensylvanica L. f. — pin cherry, fire cherry, bird cherry — 29 images
Prunus persica (L.) Batsch — peach — 15 images
Prunus serotina Ehrh. — black cherry — 52 images
Prunus susquehanae Willd. ( = pumila var. susquehanae (Willd.) Jaeger) — sand cherry — 23 images
Prunus virginiana L. — chokecherry — 24 images
Pseudotsuga menziesii E. Murray — Douglas fir — 23 images
Ptelea trifoliata L. — common hoptree, stinking ash — 4 images
Pteridium aquilinum (L.) Kuhn — bracken fern — 19 images
Puccinellia maritima (Hudson) Parl. — seaside alkali-grass — 4 images
Pueraria montana var. lobata (Willd.) Maesen et S. Almeida — kudzu — 12 images
Pycnanthemum incanum (L.) Michx. — hoary mountain-mint — 4 images
Pycnanthemum muticum (Michaux) Pers. — short-toothed mountain mint — 23 images
Pycnanthemum tenuifolium Schrader — slender-leaved mountain mint — 15 images
Pyrola americana Sweet ( = rotundifolia var. americana (Sweet) Fern.) — round-leaved shinleaf, glossy shinleaf — 24 images
Pyrola chlorantha Sw. ( = virens Schreb.) — green-flowered shinleaf — 4 images
Pyrola elliptica Nutt. — elliptic shinleaf — 10 images
Pyrola sp. — 5 images
Pyrus communis L. — pear — 2 images
Quercus alba L. — white oak — 53 images
Quercus bicolor Willd. — swamp white oak — 51 images
Quercus cf. alba x prinoides — 2 images
Quercus coccinea Muenchh. — scarlet oak — 31 images
Quercus ilicifolia Wangenh. — scrub oak, bear oak — 55 images
Quercus marilandica Muench. — barren oak — 1 image
Quercus muehlenbergii Englem. — yellow oak, chinquapin oak — 1 image
Quercus palustris Muenchh. — pin oak — 18 images
Quercus prinoides Willd. — dwarf chestnut oak — 43 images
Quercus prinus L. — chestnut oak — 22 images
Quercus robur L. — English oak — 12 images
Quercus rubra L. — northern red oak — 46 images
Quercus sp. — 3 images
Quercus sp1. cf. alba — 4 images
Quercus stellata Wangenh. — post oak — 9 images
Quercus velutina Lam. — black oak — 32 images
Quercus x saulii C. Schneider — Saul's oak — 14 images
Ranunculus abortivus L. — kidney-leaved buttercup, small-flowered crowfoot — 7 images
Ranunculus acris L. — tall buttercup — 4 images
Ranunculus allegheniensis Britton — Allegheny buttercup — 5 images
Ranunculus bulbosus L. — crowfoot, bulbous buttercup — 12 images
Ranunculus ficaria L. ( = Ficaria verna (L.) Huds.) — lesser celandine, pilewort — 12 images
Ranunculus flabellaris Raf. — yellow water crowfoot — 4 images
Ranunculus recurvatus Poiret — hooked crowfoot — 19 images
Ranunculus repens L. — creeping buttercup — 11 images
Raphanus raphanistrum L. — wild radish — 20 images
Rhamnus cathartica L. — common buckthorn — 17 images
Rhamnus frangula L. ( = Frangula alnus P. Miller) — glossy buckthorn — 25 images
Rhexia virginica L. — northern meadowbeauty, wingstem meadowpitchers — 29 images
Rhinanthus minor L. ( = crista-galli L. pro parte) — yellow rattle — 2 images
Rhododendron canadense (L.) Torrey — rhodora — 11 images
Rhododendron maximum L. — great laurel, rosebay — 27 images
Rhododendron prinophyllum (Small) Millais ( = roseum (Loisel.) Rehder) — early azalea — 11 images
Rhododendron sp. — 5 images
Rhododendron viscosum (L.) Torr. — swamp azalea — 16 images
Rhodotypos scandens (Thunb.) Makino — jetbead, white kerria — 13 images
Rhus aromatica Aiton — fragrant sumac — 4 images
Rhus copallina L. — flameleaf sumac, winged sumac — 25 images
Rhus glabra L. — smooth sumac — 15 images
Rhus typhina L. ( = R. hirta (L.) Sudworth) — staghorn sumac — 19 images
Rhus vernix L. ( = Toxicodendron vernix (L.) Kuntze) — poison sumac — 20 images
Rhynchospora alba (L.) Vahl — white beak-rush — 12 images
Rhynchospora capitellata (Michx.) Vahl — brown beak-rush — 27 images
Rhynchospora inundata (Oakes) Fern. — inundated horn-sedge — 9 images
Rhynchospora macrostachya Torrey ex A. Gray — big-headed horned sedge — 30 images
Rhynchospora nitens (Vahl) A. Gray — short-beaked baldsedge — 11 images
Rhynchospora scirpoides (Torrey) A. Gray — long-beaked baldsedge — 40 images
Rhynchospora torreyana A. Gray — Torrey's beaksedge — 8 images
Ribes americanum P. Miller — American black currant — 4 images
Ribes hirtellum Michaux — swamp gooseberry — 16 images
Ribes rubrum L. — garden red currant — 4 images
Robinia hispida L. — bristly locust — 12 images
Robinia pseudoacacia L. — black locust — 27 images
Rorippa palustris (L.) Besser — marsh yellowcress — 17 images
Rosa carolina L. — Carolina rose, pasture rose — 6 images
Rosa luciae Franch. et Rochebr. ex Crepin ( = wichuraiana Crepin) — memorial rose — 16 images
Rosa multiflora Thunb. ex Murray — multiflora rose — 21 images
Rosa nitida Willd. — shiny rose, New England rose — 11 images
Rosa palustris Marsh. — swamp rose — 21 images
Rosa rugosa Thunb. — Japanese rose, saltspray rose — 28 images
Rosa virginiana P. Miller — Virginia rose, low rose — 24 images
Rubus allegheniensis Porter — Allegheny blackberry, common blackberry — 23 images
Rubus caesius L. — European forest blackberry, European dewberry — 9 images
Rubus flagellaris Willd. — northern dewberry — 11 images
Rubus hispidus L. — bristly dewberry, swamp dewberry — 26 images
Rubus idaeus ssp. strigosus (Michaux) Focke — wild red raspberry — 10 images
Rubus jaysmithii Bailey ( = scambens Bailey, tetricus Bailey) — Smith's blackberry — 6 images
Rubus laciniatus Willd. — evergreen blackberry — 13 images
Rubus occidentalis L. — black raspberry — 12 images
Rubus odoratus L. — purple-flowering raspberry, thimbleberry — 12 images
Rubus phoenicolasius Maxim. — wine raspberry — 8 images
Rubus pubescens Raf. — swamp dewberry, dwarf raspberry — 4 images
Rubus setosus Bigelow — bristly blackberry, bog blackberry — 6 images
Rubus sp. — 3 images
Rudbeckia hirta var. pulcherrima Farw. — black-eyed Susan — 8 images
Rumex acetosella L. — sheep sorrel, red sorrel — 17 images
Rumex crispus L. — curly dock — 21 images
Rumex obtusifolius L. — red-veined dock — 23 images
Rumex orbiculatus A. Gray ( = britannica L.) — great water dock — 12 images
Rumex pallidus Bigelow — seabeach dock, white dock — 4 images
Rumex salicifolius Weinm. — willow-leaf dock — 4 images
Ruppia maritima L. — ditch-grass, widgeon-grass — 4 images
Sabatia campanulata (L.) Torrey — slender marsh-pink — 7 images
Sabatia kennedyana Fern. — Plymouth gentian — 42 images
Sagina procumbens L. — matted pearlwort, birdseye — 13 images
Sagittaria engelmanniana J. G. Small — acid-water arrowhead — 9 images
Sagittaria graminea Michaux — grass-leaf arrowhead — 6 images
Sagittaria latifolia Willd. — common arrowhead — 17 images
Sagittaria teres S. Watson — pondshore or terete arrowhead — 47 images
Salicornia bigelovii Torrey — dwarf glasswort — 7 images
Salicornia maritima Wolff et Jefferies ( = europaea auct. non L.) — annual glasswort — 24 images
Salicornia virginica L. — perennial glasswort — 36 images
Salix aegyptiaca L. — 15 images
Salix alba L. — white willow — 7 images
Salix atrocinerea Brotero ( = S. cinerea ssp. oleifolia (Smith) Macreight) — rusty willow — 93 images
Salix atrocinerea and S. cinerea — rusty and ash willow with hybrids — 17 images
Salix atrocinerea x bebbiana ? — 13 images
Salix atrocinerea x humilis ? — 12 images
Salix babylonica hybrids ( = x sepulcralis = S. babylonica x alba ) — 6 images
Salix bebbiana Sarg. — Bebb's willow — 27 images
Salix candida Fluegge ex Willd. — hoary willow — 18 images
Salix cinerea L. — ash willow — 36 images
Salix discolor Muhl. — large pussy willow — 53 images
Salix eriocephala Michaux — heartleaf willow — 52 images
Salix euxina Belyaeva ( = fragilis auct. in part.) — 17 images
Salix humilis Marsh. — prairie willow, upland willow — 61 images
Salix interior Rowlee ( = exigua ssp. interior (Rowlee) Cronq.) — sandbar willow — 4 images
Salix lucida Muhl. — shining willow — 15 images
Salix nigra Marsh. — black willow — 41 images
Salix occidentalis Walter ( = tristis Ait., humilis var. microphylla (Anderss.) Fern.) — dwarf upland willow — 52 images
Salix pedicellaris Pursh — bog willow — 24 images
Salix petiolaris J. E. Smith — slender willow, meadow willow — 33 images
Salix purpurea L. — basket willow — 4 images
Salix sericea Marsh. — silky willow — 20 images
Salix serissima (Bailey) Fern. — autumn willow — 11 images
Salix sp. (hybrid) — willow — 7 images
Salix x conifera Wangenh. ( = discolor x humilis ) — 9 images
Salix x fragilis — hybrid of brittle and white willow — 13 images
Salix x jesupii Fern. ( = lucida x alba ) — 18 images
Salix x meyeriana Rostk. ( = S. pentandra x S. euxina, S. pentandra auct. in part ) — 27 images
Salix x smithiana Willd. ( = caprea (or cinerea) x viminalis ) — 3 images
Salsola kali L. — prickly or seabeach saltwort — 28 images
Sambucus canadensis L. — common elderberry — 19 images
Sambucus racemosa ssp. pubens (Michaux) House — red-berried elderberry — 3 images
Sanguinaria canadensis L. — bloodroot — 18 images
Sanguisorba minor ssp. muricata (Spach) Nordb. — garden burnet — 6 images
Sanicula marilandica L. — black snakeroot — 3 images
Saponaria officinalis L. — bouncing bet, soapwort — 6 images
Sarracenia purpurea L. — purple pitcherplant — 16 images
Sassafras albidum (Nutt.) Nees — sassafras — 52 images
Saxifraga pensylvanica L. ( = Micranthes pensylvanica (L.) Haw.) — swamp saxifrage — 11 images
Scheuchzeria palustris L. — pod-grass — 15 images
Schizachyrium scoparium (Michaux) Nash — little bluestem — 20 images
Scilla sibirica Haw. — Siberian squill — 6 images
Scirpus acutus Muhl. ex Bigelow ( = Schoenoplectus acutus (Muhl. ex Bigel.) A. et D. Love) — hard-stemmed bulrush — 5 images
Scirpus americanus Pers. ( = Schoenoplectus americanus (Pers.) Volk. ex Schrinz et Keller) — saltmarsh threesquare — 5 images
Scirpus atrocinctus Fern. — black-girdled woolsedge, dusky woolgrass — 1 image
Scirpus atrovirens var. georgianus (Harper) Fern. ( = georgianus Harper) — black bulrush — 5 images
Scirpus cyperinus (L.) Kunth — common bulrush — 17 images
Scirpus expansus Fern. — spreading bulrush — 4 images
Scirpus fluviatilis (Torrey) A. Gray ( = Bolboschoenus fluviatilis (Torr.) Sojak) — river bulrush — 4 images
Scirpus longii Fernald — Long's bulrush — 2 images
Scirpus pungens Vahl. ( = americanus auct. non Pers.) — common threesquare — 7 images
Scirpus robustus Pursh ( = Bolboschoenus robustus (Pursh) Sojak) — saltmarsh bulrush — 11 images
Scirpus smithii A. Gray ( = Schoenoplectus smithii (A. Gray) Sojak) — Smith's clubsedge — 14 images
Scirpus subterminalis Torrey — water bulrush, floating bulrush — 15 images
Scirpus tabernaemontani K.C. Gmelin ( = Schoenoplectus tabernaemontani (K.C. Gmelin) Pallas, validus Vahl.) — soft-stemmed bulrush — 15 images
Scirpus verecundus Fern. ( = Trichophorum planifolium (Spreng.) Palla) — woodland bulrush — 12 images
Scleranthus annuus L. — annual knawel — 9 images
Scleria pauciflora var. caroliniana (Willd.) Wood — papillose nutsedge — 16 images
Scleria reticularis Michaux — pondshore nutsedge — 30 images
Scrophularia nodosa L. — wood figwort — 19 images
Scutellaria galericulata L. ( = epilobiifolia Hamilton) — marsh scullcap, common scullcap — 8 images
Scutellaria lateriflora L. — mad-dog skullcap, blue skullcap — 11 images
Sedum acre L. — goldmoss stonecrop — 6 images
Sedum telephium L. ( = purpureum (L.) Schultes) — live-forever — 1 image
Selaginella rupestris (L.) Spring — rock spikemoss — 13 images
Senecio aureus L. ( = Packera aurea (L.) A. et D. Love) — golden ragwort — 12 images
Senecio obovatus Muhl. ex Willd. ( = Packera obovata (Muhl. ex Willd.) W.A. Weber et A. Love) — broad-leaved ragwort — 7 images
Senecio vulgaris L. — common groundsel — 5 images
Sericocarpus asteroides (L.) B.S.P. ( = Aster paternus Cronq.) — toothed white-topped aster — 13 images
Sericocarpus linifolius (L.) B.S.P. ( = Aster solidagineus Michaux) — narrow-leaved white-topped aster — 13 images
Setaria faberi Herrm. ex Rosen — giant foxtail — 10 images
Setaria parviflora (Poiret) Kerguelen — bristly foxtail — 4 images
Setaria pumila (Poir.) Roemer et J.A. Schultes ( = glauca auct., non (L.) Beauv.) — yellow foxtail — 17 images
Setaria viridis (L.) Beauv. — green foxtail — 2 images
Sibbaldiopsis tridentata (Aiton) Rydb. ( = Potentilla tridentata Aiton) — three-toothed cinquefoil — 11 images
Sicyos angulatus L. — one-seeded burr cucumber — 4 images
Silene antirrhina L. — sleepy catchfly — 7 images
Silene armeria L. — sweet-william catchfly — 10 images
Silene dioica (L.) Clairv. ( = Lychnis dioica L.) — red campion — 3 images
Silene latifolia ssp. alba (P. Mill.) Greuter et Burdet ( = Lychnis alba P. Miller) — white campion or evening lychnis — 19 images
Silene vulgaris (Moench) Garcke ( = cucubalus Wibel) — bladder-campion — 6 images
Silphium perfoliatum L. — cup plant — 10 images
Sisymbrium altissimum L. — tumbling mustard — 4 images
Sisymbrium loeselii L. — Loesel's mustard — 5 images
Sisymbrium officinale (L.) Scop. — hedge mustard — 4 images
Sisyrinchium angustifolium P. Miller — stout blue-eyed-grass — 15 images
Sisyrinchium atlanticum Bicknell — eastern blue-eyed-grass — 4 images
Sisyrinchium fuscatum Bicknell ( = arenicola Bicknell) — sandplain blue-eyed grass — 2 images
Sisyrinchium montanum var. crebrum Fern. — meadow blue-eyed grass — 6 images
Sium suave Walter — water parsnip — 10 images
Smilacina racemosa (L.) Desf. ( = Maianthemum racemosum (L.) Link) — false Solomon's seal — 10 images
Smilacina stellata (L.) Desf. ( = Maianthemum stellatum (L.) Link) — starry Solomon's seal — 7 images
Smilax glauca Walter — sawbrier, wild sarsaparilla — 20 images
Smilax herbacea L. — carrion-flower — 10 images
Smilax rotundifolia L. — catbrier, bullbrier — 24 images
Solanum carolinense L. — horsenettle — 14 images
Solanum dulcamara L. — climbing nightshade, bittersweet nightshade — 14 images
Solanum nigrum L. — black nightshade — 4 images
Solanum ptycanthum Dun. — American black nightshade — 8 images
Solidago altissima L. ( = canadensis var. scabra Torr. et Gray) — tall goldenrod — 10 images
Solidago arguta Aiton — sharp-leaved goldenrod — 3 images
Solidago bicolor L. — silverrod, white goldenrod — 15 images
Solidago caesia L. — wreath goldenrod, bluestem goldenrod — 5 images
Solidago canadensis L. — Canada goldenrod — 6 images
Solidago flexicaulis L. — zigzag goldenrod — 5 images
Solidago gigantea Aiton — smooth goldenrod, late goldenrod — 12 images
Solidago juncea Aiton — early goldenrod — 9 images
Solidago latissimifolia P. Miller — Elliott's goldenrod — 10 images
Solidago nemoralis Ait. — gray goldenrod — 13 images
Solidago odora Aiton — licorice goldenrod, sweet goldenrod — 17 images
Solidago puberula Nutt. — downy goldenrod — 11 images
Solidago rugosa P. Miller — rough-stemmed goldenrod — 13 images
Solidago rugosa ssp. aspera (Aiton) Cronq. — rough goldenrod, barrens goldenrod — 13 images
Solidago sempervirens L. — seaside goldenrod — 32 images
Solidago speciosa Nutt. — showy goldenrod — 9 images
Solidago uliginosa Nutt. — swamp goldenrod — 5 images
Sonchus arvensis L. — field sow-thistle — 10 images
Sonchus asper (L.) Hill — spiny-leaved sow-thistle — 1 image
Sonchus oleraceus L. — annual sow-thistle — 10 images
Sorbus alnifolia (Siebold et Zucc.) K. Koch — alder-leaved mountain-ash — 1 image
Sorbus aucuparia L. — European mountain-ash — 6 images
Sorghastrum nutans (L.) Nash — Indian grass — 19 images
Sparganium americanum Nutt. — common bur-reed — 22 images
Sparganium erectum L. ( = chlorocarpum Rydb.) — green-fruited bur-reed — 3 images
Sparganium eurycarpum Engelm. ex A. Gray — giant bur-reed — 10 images
Spartina alterniflora Loisel — saltwater cordgrass — 22 images
Spartina cynosuroides (L.) Roth — big cordgrass — 5 images
Spartina patens (Aiton) Muhl. — salt-hay — 19 images
Spartina pectinata Link — freshwater or prairie cordgrass — 23 images
Spergula arvensis L. — corn spurrey — 23 images
Spergularia rubra (L.) J. et K. Presl — common sand spurrey — 10 images
Spergularia salina J. et K. Presl ( = marina (L.) Griseb.) — saltmarsh sand spurrey — 14 images
Spiraea alba var. latifolia (Aiton) Dippel ( = latifolia (Aiton) Borkh.) — meadowsweet — 11 images
Spiraea japonica L. f. — Japanese spiraea — 7 images
Spiraea thunbergii Sieb. — 7 images
Spiraea tomentosa L. — steeplebush — 15 images
Spiranthes cernua (L.) L.C. Rich. — nodding ladies' tresses — 16 images
Spiranthes tuberosa Raf. — little ladies' tresses — 9 images
Spirodela polyrhiza (L.) Schleiden — greater duckweed — 3 images
Stachys hyssopifolia Michaux — hyssop hedgenettle — 23 images
Stachys palustris L. — marsh hedgenettle — 13 images
Stellaria graminea L. — field stitchwort — 7 images
Stellaria media (L.) Vill. — common chickweed — 20 images
Streptopus roseus Michaux ( = lanceolatus var. roseus ) — rose twisted-stalk — 6 images
Strophostyles helvola (L.) Ell. — beach bean — 7 images
Stuckenia pectinata (L.) Boerner ( = Potamogeton pectinatus L. ) — sago false pondweed, sago pondweed — 1 image
Styphnolobium japonicum (L.) Schott. ( = Sophora japonica L.) — Japanese pagoda-tree — 3 images
Suaeda linearis (Ell.) Moq. — erect sea-blite — 12 images
Suaeda maritima (L.) Dumort. — saltmarsh sea-blite — 27 images
Symplocarpus foetidus (L.) Salisb. ex Nutt. — skunk-cabbage — 17 images
Symplocos paniculata (Thunb.) Miq. — Asiatic sweetleaf, sapphireberry — 2 images
Tanacetum vulgare L. — common tansy — 14 images
Taraxacum laevigatum (Willd.) DC. ( = erythrospermum Andrz. ex Besser) — red-seeded dandelion — 4 images
Taraxacum officinale G.H. Weber ex Wiggers — common dandelion — 10 images
Taxus canadensis Marsh. — Canada yew — 19 images
Taxus sp. ( = T. cuspidata, or T. baccata, or their hybrids ) — 5 images
Teesdalia nudicaulis Ait. f. — shepherd cress — 37 images
Tephrosia virginiana (L.) Pers. — goat's rue — 12 images
Teucrium canadense L. — American germander, saltmarsh germander — 11 images
Thalictrum dioicum L. — early meadowrue — 15 images
Thalictrum pubescens Pursh ( = polygamum Muhl. ex Spreng.) — tall meadowrue — 10 images
Thalictrum revolutum DC. — waxy-leaved meadowrue — 26 images
Thelypteris noveboracensis (L.) Nieuwl. — New York fern — 10 images
Thelypteris palustris Schott — marsh fern — 18 images
Thelypteris simulata (Davenport) Nieuwl. — Massachusetts fern — 17 images
Thermopsis villosa (Walter) Fern. et Schubert — hairy bush-pea, Blue Ridge buckbean — 3 images
Thinopyrum pycnanthum (Pers.) Barkworth ( = Elymus pungens ssp. pycnanthus (Godr.) O. Bolos et Vigo) — seabeach quack-grass — 3 images
Thlaspi arvense L. — field pennycress — 23 images
Thuja occidentalis L. — arbor vitae — 8 images
Tiarella cordifolia L. — foamflower — 11 images
Tilia americana L. — basswood, American linden — 18 images
Tilia cordata P. Miller — small-leaved linden — 2 images
Tilia x vulgaris Hayne ( = cordata x platyphyllos ) — common lime — 2 images
Torreyochloa pallida (Torrey) Church ( = Glyceria pallida (Torrey) Trin.) — pale mannagrass — 1 image
Torreyochloa pallida var. fernaldii (A.S. Hitchc.) Dore ex Koyama et Kawano ( = Glyceria fernaldii (A.S. Hitchc.) St. John) — slender mannagrass — 7 images
Toxicodendron radicans (L.) Kuntze ( = Rhus radicans L.) — poison ivy — 38 images
Tradescantia ohiensis Raf. — smooth spiderwort — 3 images
Tradescantia virginiana L. — Virginia spiderwort — 10 images
Tragopogon pratensis L. — yellow goat's-beard — 5 images
Trapa natans L. — water chestnut; water caltrop — 9 images
Triadenum virginicum (L.) Raf. ( = Hypericum virginicum L.) — marsh St. John's-wort — 15 images
Trichostema dichotomum L. — forked bluecurls — 24 images
Trientalis borealis Raf. ( = Lysimachia borealis (Raf.) U. Manns et A. Anderb.) — American starflower — 11 images
Trifolium agrarium L. ( = aureum Pollich) — golden clover, palmate clover — 8 images
Trifolium arvense L. — rabbit-foot clover — 8 images
Trifolium hybridum L. — alsike clover — 5 images
Trifolium pratense L. — red clover — 6 images
Trifolium repens L. — white clover — 14 images
Triglochin maritimum L. — saltmarsh arrow-grass — 20 images
Trillium cernuum L. — nodding trillium — 7 images
Trillium erectum L. — red trillium, purple trillium — 13 images
Trillium undulatum WIlld. — painted trillium — 9 images
Triodanis perfoliata (L.) Nieuwl. ( = Specularia perfoliata (L.) A. DC.) — Venus' looking-glass — 6 images
Triplasis purpurea (Walter) Chapman — purple sandgrass — 7 images
Tsuga canadensis (L.) Carr. — eastern hemlock — 36 images
Tussilago farfara L. — coltsfoot — 26 images
Typha angustifolia L. — narrow-leaved cattail — 12 images
Typha latifolia L. — broad-leaved cattail — 22 images
Typha sp. — cattail — 2 images
Ulmus americana L. — American elm, white elm — 19 images
Ulmus glabra Hudson — Scotch elm — 3 images
Ulmus procera Salisb. — English elm — 2 images
Ulmus pumila L. — Siberian elm — 7 images
Urtica dioica ssp. dioica L. — stinging nettle — 14 images
Utricularia cornuta Michaux — horned bladderwort, naked bladderwort — 27 images
Utricularia geminiscapa Benj. — twin-scaped bladderwort — 12 images
Utricularia gibba L. — humped bladderwort — 2 images
Utricularia inflata Walter — inflated bladderwort — 16 images
Utricularia intermedia Hayne — northern bladderwort, flat-leaved milfoil — 13 images
Utricularia purpurea Walt. — purple bladderwort — 17 images
Utricularia radiata Small ( = inflata var. minor Chapman) — small floating bladderwort — 18 images
Utricularia resupinata B.D. Greene ex Bigelow — resupinate bladderwort — 18 images
Utricularia subulata L. — slender, subulate, or zigzag bladderwort — 15 images
Utricularia vulgaris L. ( = macrorhiza Le Conte) — common bladderwort, great bladderwort — 10 images
Uvularia grandiflora Small — large-flowered bellwort — 6 images
Uvularia sessilifolia L. — little merrybells — 17 images
Vaccaria hispanica (P. Miller) Rauschert ( = Saponaria vaccaria L.) — cow herb — 4 images
Vaccinium angustifolium Ait. — lowbush blueberry — 16 images
Vaccinium corymbosum L. — highbush blueberry — 47 images
Vaccinium fuscatum Ait. ( = atrococcum (Gray) Heller) — black highbush blueberry — 7 images
Vaccinium macrocarpon Ait. — American cranberry, large cranberry — 33 images
Vaccinium myrtilloides Michaux — velvet-leaf blueberry — 8 images
Vaccinium pallidum Ait. ( = vacillans Kalm ex Torr.) — hillside blueberry, dryland blueberry — 29 images
Vaccinium stamineum L. — deerberry — 6 images
Veratrum viride Aiton — false hellebore — 16 images
Verbascum blattaria L. — moth mullein — 6 images
Verbascum thapsus L. — common mullein — 24 images
Verbena hastata L. — blue vervain, common vervain — 18 images
Verbena urticifolia L. — white vervain — 13 images
Vernonia fasciculata Michaux — prairie ironweed — 14 images
Veronica arvensis L. — corn speedwell — 13 images
Veronica chamaedrys L. — birdseye speedwell — 2 images
Veronica hederifolia L. — ivy-leaved speedwell — 4 images
Veronica officinalis L. — common speedwell — 8 images
Veronica peregrina L. — purslane speedwell, neckweed — 3 images
Veronica serpyllifolia L. — thyme-leaf speedwell — 6 images
Viburnum acerifolium L. — maple-leaf viburnum — 15 images
Viburnum dentatum var. lucidum Ait. ( = recognitum Fern.) — northern arrowwood — 10 images
Viburnum dilatatum Thunb. — linden viburnum — 14 images
Viburnum lantana L. — twistwood, wayfaring tree — 8 images
Viburnum lantanoides Michaux ( = alnifolium Marsh.) — witch-hobble — 12 images
Viburnum lentago L. — nannyberry, sweet viburnum — 18 images
Viburnum nudum L. — smooth witherod — 4 images
Viburnum nudum var. cassinoides (L.) Torr. et Gray — wild raisin, witherod — 29 images
Viburnum opulus L. — European highbush cranberry, guelder-rose — 4 images
Viburnum plicatum Thunb. ( = tomentosum Thunb.) — Japanese snowball — 2 images
Vicia cracca L. — bird vetch — 16 images
Vicia hirsuta (L.) S.F. Gray — tiny vetch, hairy vetch — 3 images
Vicia sativa L. — spring vetch — 4 images
Vicia sativa ssp. nigra (L.) Ehrh. — narrow-leaved vetch — 8 images
Vicia tetrasperma (L.) Schreber — four-seed vetch — 8 images
Vinca minor L. — periwinkle — 9 images
Viola adunca J.E.Sm. — sand violet — 3 images
Viola blanda Willd. — sweet white violet — 6 images
Viola brittoniana Pollard — northern coastal violet, Britton's violet — 7 images
Viola canadensis L. — tall white violet — 4 images
Viola conspersa Reichenb. — American dog violet — 11 images
Viola cucullata Aiton — marsh blue violet — 9 images
Viola incognita Brainerd — large-leaved white violet — 3 images
Viola lanceolata L. — bog white violet, lanceleaf violet — 25 images
Viola macloskeyi ssp. pallens (Banks ex DC.) M.S. Baker — northern white violet — 8 images
Viola palmata var. triloba (Schwein.) Gingins ex DC. ( = triloba Schwein.) — three-lobed violet — 12 images
Viola pedata L. — birdsfoot violet — 29 images
Viola pubescens Aiton — downy yellow violet — 4 images
Viola rostrata Pursh — long-spurred violet — 5 images
Viola sagittata Aiton ( = fimbriatula J.I. Smith) — arrowleaf violet — 28 images
Viola sororia Willd. ( = papilionacea Pursh) — common blue violet — 27 images
Viola tricolor L. — garden violet — 2 images
Viola x primulifolia L. — primrose-leaf violet — 7 images
Vitis aestivalis Michaux — summer grape — 13 images
Vitis labrusca L. — fox grape — 23 images
Vitis riparia Michaux — river-bank grape, frost grape — 1 image
Vulpia octoflora var. tenella (Willd.) Fern. — six-weeks fescue — 4 images
Wisteria floribunda (Willd.) DC. — Japanese wisteria — 6 images
Wisteria sinensis (Sims) DC. — Chinese wisteria — 6 images
Wolffia columbiana Karsten — globose water-meal — 6 images
Woodwardia areolata (L.) T. Moore — netted chain fern — 20 images
Woodwardia virginica (L.) Smith — Virginia chain fern — 19 images
Xanthium echinatum Murray ( = strumarium var. canadense (P.Miller) Torrey et Gray) — cocklebur, clotbur — 16 images
Xanthium strumarium L. — European clotbur, European cocklebur — 1 image
Xyris difformis Chapman — bog yellow-eyed grass — 10 images
Xyris torta Small — twisted yellow-eyed grass — 19 images
Yucca filamentosa L. — Spanish bayonet, Adam's needle — 15 images
Zanthoxylum americanum P. Miller — northern prickly ash — 13 images
Zizania aquatica L. — wild rice — 15 images
Zizia aurea (L.) Koch — golden zizia — 6 images