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Taxon  Report  
Boechera johnstonii  (Munz) Al-Shehbaz
Johnston's rockcress
Boechera johnstonii is a perennial herb that is native to California, and endemic (limited) to California.
also called Arabis johnstonii
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
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
Observation Search
~41 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle
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Bloom Period
Genus: Boechera
Family: Brassicaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Yellow Pine Forest, Chaparral
Name Status:
Accepted by JEF + CNPS + POWO
Alternate Names:
JEFArabis hirshbergiae
JEF + CNPSArabis johnstonii
Information about  Boechera johnstonii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

Photos on Calflora

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Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[efloras.org] Habitat, Range: Flowering Feb. to Mar. Rocky areas and gravelly soil in chaparral and oak-pine savannas; of conservation concern; 1300 to 1700 m; Calif. (link added by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/12/2025).