Calflora, a 501c3 non-profit
Distribution by County   9546    
Heracleum maximum  W. Bartram
Common cow parsnip
Heracleum maximum is a perennial herb that is native to California, and also found elsewhere in North America and beyond.
also called Heracleum lanatum
Record Count by County

Alameda: 68 Inyo: 6 Napa: 12 Santa Cruz: 34
Alpine: 22 Lake: 2 Nevada: 41 Shasta: 12
Amador: 3 Lassen: 6 Placer: 57 Sierra: 24
Butte: 13 Los Angeles: 1 Plumas: 45 Siskiyou: 6
Calaveras: 2 Madera: 11 Riverside: 1 Sonoma: 122
Colusa: 3 Marin: 335 Sacramento: 1 Tehama: 9
Contra Costa: 55 Mariposa: 29 San Bernardino: 35 Trinity: 15
Del Norte: 7 Mendocino: 73 San Francisco: 38 Tulare: 41
El Dorado: 38 Modoc: 4 San Luis Obispo: 3 Tuolumne: 12
Fresno: 30 Mono: 20 San Mateo: 305
Humboldt: 51 Monterey: 26 Santa Clara: 27

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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/04/2024).