Calflora, a 501c3 non-profit
Distribution by County   4263    
Howellia aquatilis  A. Gray
Water howellia
Howellia aquatilis is an annual herb (aquatic) that is native to California, and also found elsewhere in western North America.
California Rare Plant Rank: 2B.2 (rare, threatened, or endangered in CA; common elsewhere).
Federal status: Threatened.
Record Count by County

Humboldt: 3 Mendocino: 10

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:   (Accessed: 06/16/2024).