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Taxon  Report  
Calochortus persistens  Ownbey
Siskiyou mariposa lily
Calochortus persistens is a perennial herb (bulb) that is native to California, and also found in Oregon.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
State of California status: Rare.
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
(34 records)
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: North Coastal Coniferous Forest, Yellow Pine Forest
Name Status:
Accepted by JEF + CNPS + PLANTS

Information about  Calochortus persistens from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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[Wikipedia] Rarity, Range, Habitat, Description, Threats: Calochortus persistens is a rare North American species of flowering plant in the lily family known by the common name Siskiyou mariposa lily.[1][2] It is native to northern California and southern Oregon.[3] Calochortus persistens grows at about nine sites scattered on the Gunsight-Humbug Ridge in Siskiyou County, California; in several locations on Cottonwood Peak and Little Cottonwood Peak, also in Siskiyou County;[4] and in one population of just a few individuals on Bald Mountain near Ashland in Jackson County, Oregon,[5][6] Calochortus persistens grows on rocky slopes in acidic soils and talus. This is a perennial herb producing an unbranching stem around 10 centimeters tall. There is generally one basal leaf about 20 centimeters long which persists in flowering, and one smaller leaf higher up on the stem. The inflorescence is a pair of erect, bell-shaped flowers with pinkish-purple sepals and petals 3.5 to 4 centimeter in length. The petals have bright yellow hairs near the bases. The fruit is a winged capsule about a centimeter long.[3] Threats to this rare species include invasive species, wildfire suppression, and construction and maintenance of roads and radio towers. The non-native noxious weed dyer's woad (Isatis tinctoria) directly competes with the mariposa lily by monopolizing water and nutrients and producing allelopathic substances which inhibit its germination.[5] Fire suppression efforts at the California sites have resulted in overgrowth of native trees and shrubs such as Oregon-grape (Mahonia aquifolium) and curl-leaf mountain mahogany (Cercocarpus ledifolius), which shade out small wildflowers such as mariposa lilies.[5] (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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/06/2023).