Calflora, a 501c3 non-profit
Distribution by County   12802    
Polygonum heterosepalum  M. Peck & Ownbey
Oddsepal knotweed
Polygonum heterosepalum is an annual or perennial herb that is not native to California.
Record Count by County


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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/08/2025).