Page author: David Giblin
Polygonum ramosissimum
branched knotweed
Specimens
Photos
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Disturbed areas, often where wet, from low to middle elevations.
Flowers: July-September
Origin: Native
Growth Duration: Annual
Conservation Status: Not of concern
Description:
[none provided]
Accepted Name:
Polygonum ramosissimum Michx.
Publication: Fl. Bor.-Amer. 1: 237. 1803.
Publication: Fl. Bor.-Amer. 1: 237. 1803.
Synonyms & Misapplications:
(none provided)
Infraspecies:
-
ssp. prolificum – proliferous knotweed
Occurring east of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast. - ssp. ramosissimum – bushy knotweed Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Additional Resources:
PNW Herbaria: Specimen records of Polygonum ramosissimum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Polygonum ramosissimum checklist entry
OregonFlora: Polygonum ramosissimum information
E-Flora BC: Polygonum ramosissimum atlas page
CalPhotos: Polygonum ramosissimum photos
3 photographs:
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