Page author: David Giblin
Polygonum erectum
erect knotweed

Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to Oregon and Nevada, east from the Rocky Mountains and northern Great Plains to the Altantic Coast.

Habitat: Dry, disturbed ground.

Flowers: June-September

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies


[none provided]

Accepted Name:
Polygonum erectum L.
Publication: Sp. Pl. 1: 363. 1753.

Synonyms & Misapplications:
Polygonum aviculare L. var. erectum (L.) Roth ex Meisn.
Additional Resources:

PNW Herbaria: Specimen records of Polygonum erectum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Polygonum erectum checklist entry

OregonFlora: Polygonum erectum information

E-Flora BC: Polygonum erectum atlas page

CalPhotos: Polygonum erectum photos

2 photographs:
Group by