logo Calflora, a 501c3 non-profit
Taxon  Report  
Crossosoma bigelovii  S. Watson
Bigelow crossosoma,   Bigelow's ragged rock flower,   Ragged rockflower,   Rock crossosoma
Crossosoma bigelovii is a shrub that is native to California, and also found elsewhere in western North America.
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
DJJJASONAFMM

Bloom Period
Genus: Crossosoma
Family: Crossosomataceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Creosote Bush Scrub
Name Status:
Accepted by JEF + PLANTS + POWO
Information about  Crossosoma bigelovii from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (CRBI2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[Wikipedia] Cultivation: Ragged rockflower is occasionally used as an ornamental plant in habitat gardens and natural landscaping. It can be grown from seed in well-drained soil for a desert butterfly garden. It is a difficult plant for the average homeowner to grow, as over-watering will kill it. (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: 05/20/2025).