Page author: David Giblin
Polygonum californicum
California knotweed
Specimens
Photos
Distribution: Occurring in the east end of the Columbia River Gorge in Washington; south-central Washington to California.
Habitat: Dry rocky slopes, gravelly ground at low elevations.
Flowers: May-July
Origin: Native
Growth Duration: Annual
Conservation Status: Review Group 1 in Washington (WANHP)
Pollination: Bees, flies
Description:
[none provided]
Accepted Name:
Polygonum californicum Meisn.
Publication: Prodr. 14: 100. 1856.
Publication: Prodr. 14: 100. 1856.
Synonyms & Misapplications:
Duravia californica (Meisn.) Greene
Polygonum greenii S. Watson
Polygonum greenii S. Watson
Additional Resources:
PNW Herbaria: Specimen records of Polygonum californicum in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Polygonum californicum checklist entry
OregonFlora: Polygonum californicum information
E-Flora BC: Polygonum californicum atlas page
CalPhotos: Polygonum californicum photos
5 photographs:
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