Calflora, a 501c3 non-profit
Distribution by County   738    
Asclepias asperula  (Decne.) Woodson  ssp. asperula 
Antelope horns,   Spider milkweed
Asclepias asperula ssp. asperula is a perennial herb that is native to California, and also found elsewhere in western North America.
California Rare Plant Rank: 4.3 (limited distribution).   CNDDB
Record Count by County

San Bernardino: 37

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: 11/30/2022).