Polygonum bidwelliae Calflora

Distribution by County 6740

Polygonum bidwelliae S. Watson

Bidwell's knotweed

Polygonum bidwelliae is an annual herb that is native to California, and endemic (limited) to California.

California Rare Plant Rank: 4.3 (limited distribution).

Record Count by County


Butte: 90	Shasta: 33	Tehama: 75

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: 04/10/2025).