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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Polygonum californicum

Polygonum californicum Meisn.

California Knotweed

Polygonaceae (Buckwheat family)

Synonym(s): Polygonum greenii

USDA Symbol: POCA7

USDA Native Status: L48 (N)

 

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Plant Characteristics

Duration: Annual
Habit: Herb
Fruit Type: Achene
Size Notes: Up to about 16 inches tall.

Bloom Information

Bloom Color: White , Pink
Bloom Time: May , Jun , Jul , Aug , Sep , Oct

Distribution

USA: CA , OR , WA
Native Habitat: Open places, including serpentine.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Polygonum californicum in USDA Plants
FNA: Find Polygonum californicum in the Flora of North America (if available)
Google: Search Google for Polygonum californicum

Metadata

Record Modified: 2020-11-12
Research By: CBR

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