Taxon  Report   6758    
Polygonum minimum  S. Watson
Broadleaf knotweed,  Leafy dwarf knotweed, Little mountain knotweed
Polygonum minimum
© 2009 Neal Kramer
Photos from
CalPhotos / Calflora
Polygonum minimum
© 2011 Steve Matson
Polygonum minimum
© 2012 Steve Matson
Polygonum minimum, 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 minimum
© 2008 Steve Matson
Genus: Polygonum
Communities: Subalpine Forest, Lodgepole Forest, wetland-riparian

Wetlands: Occurs usually in non wetlands, occasionally in wetlands

Habitat: streambanks, meadows

Name Status:
Accepted by JEF + PLANTS

More information about  Polygonum minimum
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

ITIS Original Publication citation


Search the International Plants Names Index

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 16, 2019).