Calflora
Taxon  Report   11039    
Polygonum sawatchense  Small
Knotweed
Polygonum sawatchense
© 2012 Dean Wm. Taylor. Ph. D.
Photos from
CalPhotos / Calflora
Polygonum sawatchense
© 2009 Barry Breckling
Polygonum sawatchense, a dicot, is an annual herb that is native to California.

Interactive Distribution Map


Observation Hotline
(observation details + photos)



point, line, or polygon

Plant Characteristics
and Associations



Bloom Period
Polygonum sawatchense
© 2009 Barry Breckling
Family: POLYGONACEAE  
Genus: Polygonum
Subspecies and Varieties:
Wetlands: Occurs usually in non wetlands, occasionally in wetlands
Name Status:
Accepted by JEF

PLANTS accepted name:
Polygonum douglasii ssp. johnstonii

 
More information about  Polygonum sawatchense
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 (PODOJ2)

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]. 2018. Berkeley, California: The Calflora Database [a non-profit organization].
Available: https://www.calflora.org/   (Accessed: Nov 15, 2018).

The information on this page comes from diverse sources. None of the links are sponsored.