Native Plants
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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)
From the Image Gallery
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Plant Characteristics
Duration: AnnualHabit: Herb
Fruit Type: Achene
Size Notes: Up to about 16 inches tall.
Bloom Information
Bloom Color: White , PinkBloom Time: May , Jun , Jul , Aug , Sep , Oct
Distribution
USA: CA , OR , WANative Habitat: Open places, including serpentine.
Web Reference
Webref 30 - Calflora (2018) CalfloraWebref 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 PlantsFNA: Find Polygonum californicum in the Flora of North America (if available)
Google: Search Google for Polygonum californicum
Metadata
Record Modified: 2020-11-12Research By: CBR