Calflora
Taxon  Report   11040    
Polygonum spergulariiforme  Meisn. ex Small
Spurry knotweed
Polygonum spergulariiforme
© 2008 Sierra Pacific Industries
Photos from
CalPhotos / Calflora
Polygonum spergulariiforme
© 2008 Sierra Pacific Industries
Polygonum spergulariiforme
© 2008 Sierra Pacific Industries
Polygonum spergulariiforme, a dicot, is an annual herb that is native to California, is also found outside of California, but is confined to western North America.

Interactive Distribution Map


Observation Hotline
(observation details)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Polygonum spergulariiforme
© 2008 Sierra Pacific Industries
Family: POLYGONACEAE  
Genus: Polygonum
Communities: Yellow Pine Forest, Chaparral, Coastal Prairie

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Serpentine affinity: 3; (strong indicator)

Habitat: slopes

Name Status:
Accepted by JEF

PLANTS accepted name:
Polygonum douglasii ssp. spergulariiforme

Alternate Names:
ICPN: Polygonum douglasii ssp. spergulariiforme
More information about  Polygonum spergulariiforme
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on PlantID.net   /   Google Images
Jepson eFlora

Records from the Consortium of California Herbaria

USDA PLANTS Profile (PODOS2)

Search efloras.org (Flora of North America)

website references from Google


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: Jan 21, 2019).