Calflora, a 501c3 non-profit
Distribution by County   6757    
Polygonum marinense  T. R. Mert. & P. H. Raven
Marin knotweed
Polygonum marinense is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 3.1 (review list).   CNDDB

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]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 11/27/2022).