Taxon  Report   477    
Arabis platysperma  A. Gray  var. howellii  (S. Watson) Jeps.  
(no longer an active name)
Howell's broad seeded rock cress,  Howell's pioneer rockcress, Howell's rockcress
Arabis platysperma var. howellii, a dicot, is a perennial herb that is native to California.
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
Genus: Arabis
Parent: Arabis platysperma

Name Status:
Accepted by PLANTS

JEF other name:
Boechera howellii

Alternate Names:
PLANTS: Arabis conferta
PLANTS: Arabis covillei
PLANTS: Arabis howellii
. . .
NOTE: Arabis platysperma var. howellii is no longer an active name.
More information about  Arabis platysperma var. howellii
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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]. 2020. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jul 12, 2020).