Calflora, a 501c3 non-profit
Distribution by County   3015    
Epilobium rigidum  Hausskn.
Siskiyou mtns. willowherb,   Stiff willowherb
Epilobium rigidum is a perennial herb that is native to California, and also found in Oregon.
California Rare Plant Rank: 4.3 (limited distribution).
Record Count by County

Del Norte: 96 Siskiyou: 2 Trinity: 2

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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 12/04/2023).