Calflora, a 501c3 non-profit
Distribution by County   12460    
Water horsetail
Equisetum fluviatile is a fern that is not native to California.
Record Count by County

San Francisco: 1 San Mateo: 1

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]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 10/08/2026).