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Taxon  Report  
Streptanthus polygaloides  A. Gray
Milkwort jewelflower
Streptanthus polygaloides is an annual herb that is native to California, and endemic (limited) 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
bloom graphic
Bloom Period
Genus: Streptanthus
Family: Brassicaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 5.7 - strict endemic

Habitat: slopes

Communities: Yellow Pine Forest, Foothill Woodland

Name Status:
Accepted by JEF + PLANTS
Information about  Streptanthus polygaloides from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (STPO2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

SERPENTINE SOILS ... Earl B. Alexander: 
In Fremontia v. 38:4/39:1 (October 2010)
Plants that thrive on serpentine soils have unusual capabilities to utilize calcium when the alkaline earth elements are dominated by magnesium, and to tolerate concentrations of cobalt and nickel that are toxic to most plants. ...
There are only two Ni hyperaccumulating species in California, and both are in the mustard (Brassicaceae) family: milkwor tjewel flower (Streptanthus polygaloides) ...

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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 02/01/2023).