Taxon  Report   6738    
Polygonum argyrocoleon  Kunze
Persian knotweed,  Silver sheath knotweed, Silversheath knotweed
Polygonum argyrocoleon
© 2017 Neal Kramer
Photos from
CalPhotos / Calflora
Polygonum argyrocoleon
© 2017 Neal Kramer
Polygonum argyrocoleon
© 2017 Neal Kramer
Polygonum argyrocoleon, a dicot, is an annual herb that is not native to California; it was introduced from elsewhere and naturalized in the wild.

Interactive Distribution Map

Observation Hotline
(observation details)

point, line, or polygon

Plant Characteristics
and Associations

Bloom Period
Polygonum argyrocoleon
© 2018 Ron Vanderhoff
Genus: Polygonum
Communities: weed, characteristic of disturbed places, wetland-riparian

Wetlands: Equally likely to occur in wetlands and non wetlands

Habitat: disturbed

Name Status:
Accepted by JEF + PLANTS

More information about  Polygonum argyrocoleon
Nursery / seed vendor availability from CNPLX
Commercial availability unknown.
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 23, 2019).