Calflora, a 501c3 non-profit
Distribution by County   8187    
Urtica dioica  L.  ssp. holosericea  (Nutt.) Thorne
Giant creek nettle, Hoary nettle, Mountain nettle, Stinging nettle
Urtica dioica ssp. holosericea is a perennial herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Alameda: 44 Lassen: 16 Plumas: 13 Siskiyou: 14
Alpine: 12 Los Angeles: 85 Riverside: 29 Solano: 4
Amador: 3 Madera: 5 Sacramento: 9 Sonoma: 21
Butte: 18 Marin: 58 San Benito: 68 Stanislaus: 2
Colusa: 3 Mariposa: 2 San Bernardino: 51 Sutter: 4
Contra Costa: 31 Mendocino: 11 San Diego: 182 Tehama: 5
Del Norte: 1 Merced: 5 San Francisco: 26 Trinity: 2
El Dorado: 1 Modoc: 8 San Joaquin: 6 Tulare: 18
Fresno: 19 Mono: 33 San Luis Obispo: 63 Tuolumne: 1
Glenn: 4 Monterey: 59 San Mateo: 63 Ventura: 36
Humboldt: 5 Napa: 4 Santa Barbara: 93 Yolo: 1
Inyo: 16 Nevada: 2 Santa Clara: 24
Kern: 30 Orange: 45 Santa Cruz: 26
Lake: 8 Placer: 13 Shasta: 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]. 2026. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/22/2026).