Taxon  Report   8835    
Polygonum hickmanii  H. R. Hinds & Rand. Morgan
Hickman's knotweed
Polygonum hickmanii
© 2006 California Department of Fish and Game
Photos from
CalPhotos / Calflora
Polygonum hickmanii, a dicot, is an annual herb that is native to California.
California Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).   8th Edition

It is listed by the State of California as Endangered and by the Federal Government as 'Endangered '.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

one or more occurrences
within a 7.5-minute quadrangle

Plant Characteristics
and Associations

Bloom Period
Polygonum hickmanii
© 2006 California Department of Fish and Game
Genus: Polygonum
Name Status:
Accepted by JEF + CNPS + PLANTS

More information about  Polygonum hickmanii
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
Landscaping information from Calscape
Photos on Google Images
Jepson eFlora

Records from the Consortium of California Herbaria


Search (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:   (Accessed: Jan 23, 2019).