Polygonaceae

Pennsylvania smartweed

Persicaria pensylvanica (L.) M.Gómez

Family: Polygonaceae
Genus: Persicaria

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Pennsylvania smartweed (Persicaria pensylvanica) — FlowerPhoto: M. Whitson, CC BY 4.0, from iNaturalist

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Common names

By language (6)

Chinese: 宾洲蓼
Czech: Rdesno pensylvánské
Dutch: Amerikaans perzikkruid
English: Pennsylvania smartweed
Finnish: Pensylvaniantatar
Welsh: Y ganwraidd rosliw

Synonyms

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

Flowers

In flower: August to October (from 992 flowering iNaturalist observations worldwide)

Photos

FlowerPhoto: M. Whitson, CC BY 4.0, from iNaturalist
FlowerPhoto: Sandy Wolkenberg, CC BY 4.0, from iNaturalist
FlowerPhoto: Tom Norton, CC BY 4.0, from iNaturalist
FlowerPhoto: Tom Norton, CC BY 4.0, from iNaturalist
Photo: Andrew C, CC BY 2.0, from Wikimedia Commons
Photo: Daniel Atha, CC0, from iNaturalist
Photo: Juan Carlos Fonseca Mata, CC BY-SA 4.0, from Wikimedia Commons
Photo: Alan Weakley, CC0, from iNaturalist
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons
Photo: Daniel Atha, CC0, from iNaturalist
Photo: Ayotte, Gilles, 1948-, CC BY-SA 4.0, from Wikimedia Commons

More in Persicaria

Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0). About our plant data.