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Taxon  Report  
Ranunculus bonariensis  Poir.  var. trisepalus  (Gillies ex Hook. & Arn.) Lourteig
Carter's buttercup,   Vernal pool buttercup
Ranunculus bonariensis var. trisepalus 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
DJJJASONAFMM

Bloom Period
Parent: Ranunculus bonariensis
Genus: Ranunculus
Family: Ranunculaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Do not eat any part of this plant.

Wetlands: Occurs in wetlands

Communities: Foothill Woodland, Valley Grassland, wetland-riparian

Name Status:
Accepted by JEF + PLANTS + POWO
Alternate Names:
JEF + PLANTSRanunculus alveolatus
PLANTSRanunculus trisepalus
Information about  Ranunculus bonariensis var. trisepalus from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (RABOT)

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: 07/19/2025).