Calflora, a 501c3 non-profit
Distribution by County   490    
Arabis rigidissima  Rollins  var. rigidissima 
Trinity mountain rockcress,   Trinity mtns. rock cress
Arabis rigidissima var. rigidissima is a perennial 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

Siskiyou: 3 Trinity: 4

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: 07/20/2024).