Calflora, a 501c3 non-profit
Distribution by County   7524    
Senecio vulgaris  L.
Common groundsel,   Old man in the spring,   Old man of spring
Senecio vulgaris is an annual herb that is not native to California.
Record Count by County

Alameda: 68 Lake: 25 Plumas: 2 Sierra: 3
Amador: 7 Lassen: 1 Riverside: 98 Solano: 67
Butte: 125 Los Angeles: 210 Sacramento: 38 Sonoma: 69
Calaveras: 3 Madera: 9 San Benito: 106 Stanislaus: 17
Colusa: 12 Marin: 88 San Bernardino: 44 Sutter: 12
Contra Costa: 48 Mariposa: 27 San Diego: 235 Tehama: 55
Del Norte: 6 Mendocino: 39 San Francisco: 66 Trinity: 4
El Dorado: 27 Merced: 50 San Joaquin: 7 Tulare: 51
Fresno: 71 Mono: 1 San Luis Obispo: 84 Tuolumne: 11
Glenn: 7 Monterey: 133 San Mateo: 90 Ventura: 90
Humboldt: 28 Napa: 51 Santa Barbara: 107 Yolo: 58
Imperial: 1 Nevada: 22 Santa Clara: 80 Yuba: 14
Kern: 53 Orange: 129 Santa Cruz: 33
Kings: 2 Placer: 26 Shasta: 10

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: 01/15/2026).