Calflora, a 501c3 non-profit
Distribution by County   12729    
Parthenium hysterophorus  L.
Santa maria feverfew
Parthenium hysterophorus is a perennial herb that is not native to California.
There is a high risk of this plant becoming invasive in California according to Cal-IPC.
Record Count by County

Orange: 70 San Diego: 3

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: 11/21/2024).