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Taxon  Report  
Phacelia grandiflora  (Benth.) A. Gray
Giant flowered phacelia,   Large flowered phacelia,   Largeflower phacelia
Phacelia grandiflora is an annual herb that is native to California, and found only slightly beyond California borders.
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

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

Communities: Coastal Sage Scrub, Chaparral
Name Status:
Accepted by JEF + PLANTS

Alternate Names:
JEFCosmanthus grandiflorus
JEFEutoca grandiflora
JEFEutoca speciosa
Information about  Phacelia grandiflora from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora


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[Wikipedia] Range, Description: Phacelia grandiflora is a species of phacelia known by the common name largeflower phacelia. It is native to the coastal hills and southern Transverse Ranges of southern California and Baja California, where it grows in coastal sage scrub, chaparral, and other local habitat, including areas recently burned by wildfire. Description Phacelia grandiflora is an annual herb with a branching or unbranched erect stem reaching one meter in maximum height. It is glandular and coated in soft and stiff hairs. The leaves are up to 15 centimeters long with toothed, rounded or oval blades borne on long petioles. The large, hairy, glandular inflorescence is a one-sided curving or coiling cyme of widely bell-shaped flowers. Each flower is up to 2.5 centimeters long and purple to blue in color, usually with a paler throat. There are reports that glandular hairs of stems, flowers and leaves of P. grandiflora secrete oil droplets that can cause an unpleasant skin rash (contact dermatitis) in some people.[1] (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: 04/12/2024).