logo Calflora, a 501c3 non-profit
Taxon  Report  
Euphorbia ocellata  Durand & Hilg.  ssp. rattanii  (S. Watson) Oudejans
Stony creek spurge
Euphorbia ocellata ssp. rattanii is an annual herb that is native to California, and endemic (limited) to California.
also called Chamaesyce ocellata ssp. rattanii
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
~102 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle
DJJJASONAFMM

Bloom Period
Parent: Euphorbia ocellata
Genus: Euphorbia
Family: Euphorbiaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

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

Communities: Valley Grassland

Name Status:
Accepted by JEF + CNPS
Alternate Names:
JEF + CNPSChamaesyce ocellata ssp. rattanii
JEFEuphorbia ocellata var. rattanii
JEFEuphorbia rattanii
Information about  Euphorbia ocellata ssp. rattanii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net


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: 05/17/2025).