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Taxon  Report  
Euphorbia crenulata  Engelm.
Chinese caps,   Chinesecaps
Euphorbia crenulata is an annual or perennial herb 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: Euphorbia
Family: Euphorbiaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Skin irritation from touching the sap of this plant.

Communities: Northern Coastal Scrub, Coastal Sage Scrub, Closed-cone Pine Forest, Redwood Forest, Douglas-Fir Forest, Yellow Pine Forest, Mixed Evergreen Forest, Southern Oak Woodland, Foothill Woodland, Chaparral, Valley Grassland

Name Status:
Accepted by JEF + PLANTS + POWO
Alternate Names:
PLANTSTithymalus crenulatus
Information about  Euphorbia crenulata from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (EUCR2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[pnwflowers.com] Description, Habitat: Flowers with central cluster of stamens and 4 glands each with pair of points shaped like thick horns, 3-lobed ovary hanging to one side. Grows in shady sites in foothills and is widespread. Moist Riverbanks, West-Side Forest (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. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 01/25/2025).