Polygonaceae

Swamp smartweed

Persicaria hydropiperoides (Michx.) Small

Family: Polygonaceae
Genus: Persicaria

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Swamp smartweed (Persicaria hydropiperoides) — FlowerPhoto: Anne Parker, CC BY 4.0, from iNaturalist

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Common names

By language (2)

Arabic: بطباط المستنقعات
English: Swamp smartweed

Synonyms

Persicaria hydropiperoides var. hydropiperoides
Persicaria hydropiperoides var. setaceum (Small) Gleason
Polygonum barbatum Wall.
Polygonum hydropiperoides Michx.
Polygonum hydropiperoides f. leucochranthum A.H.Moore
Polygonum hydropiperoides f. strigosum (Small) Stanford
Polygonum hydropiperoides var. asperifolium Stanford
Polygonum hydropiperoides var. bushianum Stanford
Polygonum hydropiperoides var. digitatum Fernald
Polygonum hydropiperoides var. macerum Stanford
Polygonum hydropiperoides var. macounii Small
Polygonum hydropiperoides var. sanibelense Stanford
Polygonum hydropiperoides var. strigosum Small

Flowers

In flower: July to October (from 425 flowering iNaturalist observations worldwide)

Photos

FlowerPhoto: Anne Parker, CC BY 4.0, from iNaturalist
FlowerPhoto: brycelee, CC BY 4.0, from iNaturalist
FlowerPhoto: Daniel Atha, CC0, from iNaturalist
FlowerPhoto: James Hardee, CC BY 4.0, from iNaturalist
Photo: James Hardee, CC BY 4.0, from iNaturalist
Photo: Dick Culbert from Gibsons, B.C., Canada, CC BY 2.0, from Wikimedia Commons
Photo: Burckhardt D, Dalle Cort G, Queiroz DL, CC BY 4.0, from Wikimedia Commons
Photo: Timothy McNitt, CC BY 4.0, from iNaturalist
Photo: Samuel A Schmid, PhD, PWS, CC BY 4.0, from iNaturalist
Photo: Daniel Atha, CC0, from iNaturalist
Photo: Étienne Lacroix-Carignan, CC0, from iNaturalist
Photo: geosesarma, CC BY 4.0, from iNaturalist

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.