Arabis platysperma Calflora

Distribution by County 476

Arabis platysperma A. Gray

(not an active name)

Broad seeded rock cress, Pioneer rockcress

Arabis platysperma is a perennial herb that is native to California, and also found elsewhere in western North America.

also called Boechera platysperma

Record Count by County


Alpine: 21	Glenn: 6	Mariposa: 21	San Bernardino: 80
Amador: 4	Humboldt: 6	Mendocino: 7	Shasta: 14
Butte: 13	Inyo: 47	Modoc: 4	Sierra: 11
Calaveras: 1	Kern: 1	Mono: 94	Siskiyou: 45
Colusa: 2	Lake: 3	Nevada: 28	Tehama: 7
Del Norte: 5	Lassen: 3	Placer: 37	Trinity: 14
El Dorado: 53	Los Angeles: 12	Plumas: 13	Tulare: 51
Fresno: 66	Madera: 8	Riverside: 2	Tuolumne: 17

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]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/ (Accessed: 01/14/2026).