Endangered —
new location —
Plymouth
Endangered —
Introduced —
Cambridge
— has not been reported from Middlesex Co.
Endangered —
Cambridge
— from known location
Endangered —
new location —
Quincy
— relocated historic location
Threatened —
Cambridge
— from known location
Threatened —
Stoneham
— relocated historic location
Special Concern —
new location —
Hingham
— new for Hingham
Special Concern —
new location —
Plymouth
Watch-Listed —
Marshfield
— from known location
Watch-Listed —
Plymouth
— perhaps from known location
New for Massachusetts —
Introduced —
Randolph
New for Massachusetts —
Introduced —
Alewife Reservation, Cambridge
— "restoration site"
New for Massachusetts —
Introduced —
Medford
New for Massachusetts —
Introduced —
Jamaica Plain, Boston
New for Massachusetts —
Introduced —
Jamaica Plain, Boston; Medford
New for Massachusetts —
Introduced —
Plymouth
New for Massachusetts —
Introduced —
Plymouth
New for Middlesex Co. —
Introduced —
Alewife Reservation, Cambridge
New for Middlesex Co. —
Introduced —
Middlesex Fells, Winchester
— re-identified existing images (2008), ID to be confirmed
New for Norfolk Co. —
Blue Hills Reservation, Readville
— re-identified existing images
New for Plymouth Co. —
Hingham, Pembroke
New for Plymouth Co. —
Introduced —
Plymouth
New for Plymouth Co. —
Introduced —
Kingston
New for Plymouth Co. —
Introduced —
Plymouth
New for Plymouth Co. —
Introduced —
Tidmarsh Farms, Plymouth (nursery)
New for Plymouth Co. —
Introduced —
Plymouth
New for Plymouth Co. —
Morton Park, Plymouth
New for Plymouth Co. —
Introduced —
Pembroke
New for Plymouth Co. —
Hingham
New for Suffolk Co. —
Introduced —
Boston
Mt. Greylock State Park, Williamstown
— re-identified existing images
Invasive —
Kennedy Park, Lenox
Introduced —
Long Duck Pond Preserve Lots, Plymouth
Introduced —
Medford
Randolph
Plymouth, Falmouth
— re-identified existing images
Middlesex Fells, Stoneham
Blue Hills Reservation, Randolph
— photographed in November 2015
Westminster
Tidmarsh Farms, Plymouth
Introduced —
Plymouth
Middlesex Fells Reservation, Medford
Introduced —
Westwood
Blue Hills Reservation, Milton
Introduced —
Plymouth
— old record processed this year
Introduced —
Alewife Reservation, Cambridge
Introduced —
Cambridge
— Reported from this site by W. Kittredge
Introduced —
Middlesex Fells Reservation, Stoneham
Westminster
— found without fruits, identification tentative
Introduced —
Cooks Pond and vicinity, Plymouth
Introduced —
Plymouth
George Washington Forest and vicinity, Hingham
Introduced —
Middlesex Fells Reservation, Winchester
— re-identified existing images
Introduced —
Alewife Reservation, Cambridge, Pittsfield (2012)
Alewife Reservation, Cambridge
Hockomock Swamp, West Bridgewater
Introduced —
Alewife Reservation, Cambridge
— Reported from this site by W. Kittredge
Introduced —
Arnold Arboretum, Jamaica Plain, Boston
Arnold Arboretum, Jamaica Plain, Boston
— old record processed this year
Introduced —
Randolph
— escaped
Introduced —
Plymouth
— re-identified existing images
Introduced —
Boston, Milton, Sharon, Stoneham
— re-identified existing images
Introduced —
Easton
— re-identified existing images
Plymouth
Dedham, Marshfield
Cambridge
Marshfield
Plymouth
Middleborough, Plymouth, West Bridgewater
— formerly not separated from J. effusus
Plymouth
Introduced —
Milton, Randolph, Hingham, Plymouth
Introduced —
Norwood
— re-identified existing images
Introduced —
Brewster, Plymouth
— re-identified existing images
Introduced —
Plymouth
Introduced —
Morton Park, Plymouth
Introduced —
West Bridgewater
Introduced —
Alewife Reservation, Arlington
Introduced —
Tidmarsh Farms, Plymouth
— old record processed this year
Introduced —
Myles Standish State Forest, Plymouth
Introduced —
Blue Hills Reservation, Quincy
Introduced —
Three-Mile Brook, Taunton
— old record processed this year
Introduced —
Alewife Reservation
West Bridgewater
Introduced —
Kingston, and ? Quincy (Blue Hills Reservation)
Introduced —
Blue Hills Reservation, Quincy
— found by T. Palmer (new for Massachusetts)
Middlesex Fells Reservation, Stoneham
Introduced —
Stoneham
Introduced —
Pembroke
Plymouth, Marshfield
Introduced —
Blue Hills Reservation, Quincy
Cutler Park
Introduced —
Cambridge
Long Duck Pond Preserve Lots, Plymouth
— fertile specimens are rare
Middlesex Fells Reservation, Stoneham
Introduced —
Plymouth
— persisting at place of intentional planting
Introduced —
Plymouth
Plymouth
Introduced —
Tidmarsh Farms, Plymouth
Alewife Reservation, Cambridge
Introduced —
King's Pond, Plymouth
— perhaps a hybrid of this willow
Introduced —
Plymouth
— appears naturalized at King's Pond waterfront
Middlesex Fells Reservation, Stoneham
Westwood, Milton, Quincy
— formerly not separated from S. georgianus
Plymouth, Marshfield
Tidmarsh Farms, Plymouth
Cambridge
— introduced to Alewife Reservation ("restoration site")
Medford, Duxbury
— old records processed this year
Introduced —
western snowberry
Introduced —
Cambridge
Introduced —
Plymouth
Introduced —
Weymouth, Medford
— re-identified existing images
Introduced —
Weymouth, Milton
— re-identified existing images
Fairhaven
— new county record in case ID is correct
Introduced —
Plymouth, Boston, Medford
— re-identified existing images
Middlesex Fells Reservation, Stoneham
— relocated historic record
Introduced —
Blue Hills Reservation, Quincy
— ID tentative (plant vegetative)
Invasive —
Marshfield, Gardner
— re-identified existing images
Myles Standish State Forest, Plymouth
Introduced —
Alewife Reservation, Cambridge
Tidmarsh Farms, Plymouth
Introduced —
Plymouth, Stoneham
Blue Hills Reservation, Quincy
Introduced —
Plymouth
Introduced —
Long Pond, Plymouth
— persisting
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