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Taxon  Report  
Grindelia hirsutula  Hook. & Arn.
Gumweed,   Hairy gumweed
Grindelia hirsutula is a perennial herb that is native to California, and endemic (limited) to California.
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
Subspecies and Varieties:
Genus: Grindelia
Family: Asteraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Ultramafic affinity: 1.4 - weak indicator / indifferent

Communities: Coastal Sage Scrub, Foothill Woodland, wetland-riparian

Name Status:
Accepted by JEF + PLANTS

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


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[Wikipedia] Distribution, Description, Varieties: Grindelia hirsutula is a North American species of flowering plant in the family Asteraceae known by the common names hairy gumplant and hairy gumweed.[2][3] Distribution Grindelia hirsutula is native to North America, widespread across Canada and in California and Oregon.[4][5] The species is highly variable, and many local populations have been named as varieties or as distinct species. All these taxa do, however, intergrade with one another.[6] Description Grindelia hirsutula is an erect perennial herb or subshrub sometimes as much as 2.5 m (8 ft) tall but usually much shorter. The plant is usually green but the stems are often red or purplish-brown and the leaves can be somewhat yellowish to reddish. The plant can produce numerous flower heads in branching arrays at the top of the plant. Each head is 2 to 3 cm wide with hemispheric cups of greenish phyllaries around the base, the bracts claw-like and bent away from the flowers. The center of the head is filled with many small yellow disc florets surround by numerous golden ray florets. The head produces a thick white exudate, especially in new flower heads.[6] Varieties Grindelia hirsutula var. maritima ? San Francisco Gum Plant, San Francisco gumplant, coastal gumweed; endemic to coastal California in the San Francisco Bay Area.[7][8] (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: 05/20/2024).