Calflora, a 501c3 non-profit
Distribution by County   3960    
Grindelia hirsutula  Hook. & Arn.
Gumweed,   Hairy gumweed
Grindelia hirsutula is a perennial herb that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 83 Kings: 2 Placer: 2 Solano: 11
Alpine: 1 Lake: 5 Plumas: 1 Sonoma: 47
Amador: 9 Lassen: 2 Sacramento: 6 Stanislaus: 13
Butte: 31 Los Angeles: 30 San Benito: 124 Sutter: 3
Calaveras: 5 Madera: 2 San Diego: 34 Tehama: 10
Colusa: 12 Marin: 199 San Francisco: 69 Trinity: 2
Contra Costa: 65 Mariposa: 3 San Joaquin: 8 Tulare: 1
Del Norte: 8 Mendocino: 22 San Luis Obispo: 69 Tuolumne: 6
El Dorado: 8 Merced: 13 San Mateo: 88 Ventura: 25
Fresno: 5 Modoc: 18 Santa Barbara: 93 Yolo: 4
Glenn: 7 Monterey: 34 Santa Clara: 82 Yuba: 2
Humboldt: 46 Napa: 16 Santa Cruz: 37
Inyo: 1 Nevada: 5 Shasta: 9
Kern: 11 Orange: 11 Siskiyou: 6

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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/11/2025).