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Taxon  Report  
Phacelia leonis  J. T. Howell
Siskiyou phacelia
Phacelia leonis is an annual herb that is native to California, and also found in Oregon.
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
(56 records)
yellowone or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Phacelia
Family: Hydrophyllaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 3.9 - broad endemic / strong indicator

Communities: Red Fir Forest

Name Status:
Accepted by JEF + CNPS + PLANTS

Information about  Phacelia leonis from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora


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[wikipedia] Rarity, Range, Habitat, Characteristics: Phacelia leonis is a rare species of phacelia known by the common name Siskiyou phacelia. It is endemic to the Klamath Mountains of southern Oregon and far northern California, where it grows in serpentine soils in the coniferous forests. Description Phacelia leonis is an annual herb producing a usually unbranched erect stem up to 15 centimeters tall. It is glandular and lightly hairy in texture. The narrow, tapering leaves are 1 to 3 centimeters long. The hairy inflorescence is a one-sided cyme of bell-shaped flowers. Each flower is only 2 or 3 millimeters long and light blue or lavender in color. (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: 12/08/2023).