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Persicaria pensylvanica (Linnaeus) M. Gómez. Section: Persicaria. Common name: Pinkweed, Common Smartweed, Pennsylvania Smartweed. Phenology: May-Dec. Habitat: Disturbed areas, bottomlands. Distribution: NL (Newfoundland), ON, MT, and CA, south to FL, TX, AZ, and to c. Mexico; disjunct (perhaps only introduced?) in AK, Ecuador, Europe.

Origin/Endemic status: Native

Synonymy : = Ar, Can, FNA5, K4, Mex, Mi, Mo3, NE, NY, Pa, Tn, Tx, Va; = Persicaria pennsylvanica (L.) M.Gómez — S, S13, orthographic variant; = Polygonum pensylvanicum L. — C, GW2, NcTx, RAB, W, WH3, WV, Horton (1972), (basionym); < Persicaria pensylvanica (L.) M.Gómez — Fl4; > Persicaria pensylvanica (L.) M.Gómez var. dura (Stanford) C.F.Reed — Il; > Persicaria pensylvanica (L.) M.Gómez var. laevigata (Fernald) Mohlenbr. — Il; > Persicaria pensylvanica (L.) M.Gómez var. pensylvanica — Il; > Polygonum pensylvanicum L. var. durum Stanford — F; > Polygonum pensylvanicum L. var. eglandulosum Myers — F; > Polygonum pensylvanicum L. var. laevigatum Fernald — F, Tat; > Polygonum pensylvanicum L. var. nesophilum Fernald — F; > Polygonum pensylvanicum L. var. pensylvanicum — F, Tat; > Polygonum pensylvanicum L. var. rosaeflorum Norton — F

Links to other floras: = Persicaria pensylvanica - FNA5

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW
  • Eastern Mountains and Piedmont: FACW
  • Great Plains: FACW
  • Midwest: FACW
  • Northcentral & Northeast: FACW

Heliophily : 7

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image of plant© Erik Danielson source | Original Image ⭷
image of plant© Keith Bradley | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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Horticultural Information

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native range
Erect to sometimes prostrate annual of bottomlands, tidal freshwater marshes, depression ponds, wet fields and ditches.
Stems slightly zigzagged, simple or branched, smooth below and hairy to glandular hairy above.
Leaves alternate, petiolate with a membranous sheath (ocrea) where petiole joins stem, lance-shaped, to 7 in. long, often with a reddish blotch and with hairy margins.
Flowers in dense, cylindric spikes on glandular stalks from leaf axils; pink to purplish; less than 1/4 in. wide; consisting of 5 tepals that are usually closed.
1-2 ft.
Erect to sometimes prostrate annual of bottomlands, tidal freshwater marshes, depression ponds, wet fields and ditches.
Stems slightly zigzagged, simple or branched, smooth below and hairy to glandular hairy above.
Leaves alternate, petiolate with a membranous sheath (ocrea) where petiole joins stem, lance-shaped, to 7 in. long, often with a reddish blotch and with hairy margins.
Flowers in dense, cylindric spikes on glandular stalks from leaf axils; pink to purplish; less than 1/4 in. wide; consisting of 5 tepals that are usually closed.


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