Calflora, a 501c3 non-profit
Distribution by County   11667    
Erigeron canadensis  L.
Canada horseweed
Erigeron canadensis is an annual herb that is native to California, and also found elsewhere in North America and beyond.
also called Conyza canadensis

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]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: 12/08/2022).