Page authors: Don Knoke, David Giblin
Persicaria amphibia
water smartweed
WTU specimens
Other herbaria

Distribution: Widely distributed throughout Washington; distributed throughout North America and worldwide.

Habitat: Wet soil, often partially submersed.

Flowers: July-October

Origin: Native

Conservation Status: Not of concern


[none provided]

Accepted Name:
Persicaria amphibia (L.) Gray
Publication: Nat. Arr. Brit. Pl. 2: 268. 1821. 1821.

Synonyms & Misapplications:
Polygonum amphibium L. [HC]
Polygonum amphibium L. var. coccineum (Muhl. ex Willd.) Farw.
Polygonum amphibium L. var. emersum Michx. [JPM, ILBC4]
Polygonum amphibium L. var. stipulaceum N. Coleman [JPM, ILBC4]
Polygonum coccineum Muhl. ex Willd. [HC]
Polygonum natans Eaton
Additional Resources:

PNW Herbaria: Specimen records of Persicaria amphibia in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Persicaria amphibia checklist entry.

E-Flora BC: Persicaria amphibia atlas page.

CalPhotos: Persicaria amphibia photos.

USDA Plants: Persicaria amphibia information.

45 photographs:
Group by