Calflora, a 501c3 non-profit
Distribution by County   6742    
Polygonum bolanderi  W. H. Brewer
Bolander's knotweed,   Bolander's polygonum
Polygonum bolanderi is a perennial herb that is native to California, and endemic (limited) to California.
Record Count by County

Butte: 24 Humboldt: 2 Plumas: 2 Tehama: 40
Calaveras: 1 Lake: 1 Shasta: 5 Tuolumne: 1
El Dorado: 2 Napa: 31 Solano: 2
Glenn: 1 Placer: 1 Sonoma: 6

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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/15/2024).