Calflora, a 501c3 non-profit
Taxon  Report  
Ceanothus masonii  McMinn
Bolinas ceanothus,   Mason's ceanothus
Ceanothus masonii is a shrub that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).   CNDDB
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
(44 records)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Ceanothus
Family: Rhamnaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Ultramafic affinity: 3.3 - strong indicator

Communities: Chaparral

Name Status:
Accepted by JEF + CNPS + PLANTS
More information about  Ceanothus masonii

Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 10/07/2022).