Arabis platysperma var. howellii Calflora

Distribution by County 477

Arabis platysperma A. Gray var. howellii (S. Watson) Jeps.

(not an active name)

Howell's broad seeded rock cress, Howell's pioneer rockcress, Howell's rockcress

Arabis platysperma var. howellii is a perennial herb that is native to California.

Record Count by County


Alpine: 15	Madera: 7	Plumas: 4	Trinity: 7
Amador: 1	Mariposa: 11	Shasta: 15	Tulare: 27
El Dorado: 9	Mono: 51	Sierra: 2	Tuolumne: 33
Fresno: 62	Nevada: 9	Siskiyou: 21
Inyo: 34	Placer: 2	Tehama: 3

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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/ (Accessed: 12/14/2025).