Calflora, a 501c3 non-profit
Distribution by County   10550    
Cyclachaena xanthiifolia  (Nutt.) Fresen.

(not an active name)
Giant sumpweed
Cyclachaena xanthiifolia is an annual herb that is not native to California.
Record Count by County

Monterey: 1 Siskiyou: 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: 03/16/2026).