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Taxon  Report  
Calochortus simulans  (Hoover) Munz
San luis obispo mariposa lily
Calochortus simulans is a perennial herb (bulb) that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.3 (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
~105 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Calochortus
Family: Liliaceae  
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Communities: Foothill Woodland, Chaparral, Valley Grassland
Name Status:
Accepted by JEF + CNPS + PLANTS

Alternate Names:
PLANTSMariposa simulans
Information about  Calochortus simulans from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora


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[Wikipedia] Description, Distribution: Calochortus simulans is a California species of flowering plant in the lily family known by the common name San Luis Obispo mariposa lily, not to be confused with the San Luis mariposa lily C. obispoensis. Distribution It is native to San Luis Obispo County, California, and its range extends south into the northern part of Santa Barbara County.[3][4][5] Description Calochortus simulans is a perennial herb producing a branching stem up to 60 centimetres (24 inches) tall. The basal leaf is 10 to 20 centimetres (4 to 8 inches) long and withers by flowering. The inflorescence is a loose cluster of 1 to 3 erect, bell-shaped flowers. Each flower has three curving sepals and three longer petals, each up to 5 centimetres (2 inches) long. The petals are white to yellow with a deep red spot at the base. The fruit is an angled capsule 5 or 6 centimetres (2 or 2.33 inches) in length.[6] (contributed 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/19/2024).