Calflora, a 501c3 non-profit
Distribution by County   10472    
Sidotheca emarginata  (H. M. Hall) Reveal
White margined oxytheca
Sidotheca emarginata is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.3 (rare, threatened, or endangered in CA and elsewhere).
Record Count by County

Riverside: 105

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).