Persicaria pensylvanica(L.) M.Gómez

pinkweed

WFO wfo-0001100834 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Persicaria pensylvanica, photographed by Jean Sorensen
fig. a Jean Sorensen, CC BY 4.0 / 2021-09-22 / obs. 159065286
Persicaria pensylvanica, photographed by Ryan Sorrells
fig. b Ryan Sorrells, CC BY 4.0 / obs. 149486777
Persicaria pensylvanica, photographed by Judy Gallagher
fig. c Judy Gallagher, CC BY-SA 4.0 / obs. 163553893
Persicaria pensylvanica, photographed by Tom Lazar
fig. d Tom Lazar, CC0 1.0 / obs. 159634841
Persicaria pensylvanica, photographed by Tom Lazar
fig. e Tom Lazar, CC0 1.0 / obs. 156534098
Persicaria pensylvanica, photographed by Marilynn Miller
fig. f Marilynn Miller, CC BY 4.0 / obs. 148778372
Persicaria pensylvanica, photographed by threelark
fig. g threelark, CC BY 4.0 / obs. 97564274
Persicaria pensylvanica, photographed by Marilynn Miller
fig. h Marilynn Miller, CC BY 4.0 / obs. 98470609

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Flowering n = 1,199 observations

Peak flowering in Sep, from 1,199 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 9 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Persicaria mississippiensis (Stanford) Small
  • Polygonum mississippiense Stanford
  • Polygonum omissum Greene
  • Polygonum pensylvanicum L.
  • Polygonum pensylvanicum var. durum Stanford
  • Polygonum pensylvanicum var. eglandulosum Myers
  • Polygonum pensylvanicum var. laevigatum Fernald
  • Polygonum pensylvanicum var. nesophilum Fernald
  • Polygonum pensylvanicum var. rosiflorum Norton

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.