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Taxon  Report  
Lupinus hirsutissimus  Benth.
Stinging annual lupine,   Stinging lupine
Lupinus hirsutissimus is an annual herb that is native to California, and also found elsewhere in western North America.
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
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Bloom Period
Genus: Lupinus
Family: Fabaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Toxicity: Severe skin irritation from touching the leaf or stem of this plant.
Do not eat any part of this plant.

Communities: Coastal Sage Scrub, Chaparral

Name Status:
Accepted by JEF + PLANTS

Information about  Lupinus hirsutissimus from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (LUHI3)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

San Bernardino County Sentinel: Because it is so inviting visually, it often comes as a shock to those people who attempt to pick it, as its leaves and stems are covered with yellow, stinging bristles or very prickly hairs. Those having touched it will feel stung, as the bristles are loaded with histamines and, in much more minute quantities, acetylcholine, serotonin, leukotrienes, and moroidin, though the stinging lupine is not as concentrated in these substances as are some other plants such as stinging nettle or poison oak, poison ivy or poison sumac. If upon encountering stinging lupine an individual is experiencing no more than contact irritation and no allergic reaction, the symptoms can be relieved by some simple procedures...


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: 04/15/2024).