Calflora, a 501c3 non-profit
Distribution by County   11922    
Petrophytum caespitosum  (Nutt.) Rydb.  ssp. caespitosum 
Rock spiraea
Petrophytum caespitosum ssp. caespitosum is a shrub that is native to California, and also found elsewhere in western North America.
Record Count by County

Inyo: 35 Mono: 12 San Bernardino: 16

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: 11/27/2022).