Calflora, a 501c3 non-profit
Distribution by County   4142    
Heterotheca grandiflora  Nutt.
Telegraph weed, Telegraphweed
Heterotheca grandiflora is an annual or perennial herb that is native to California, and endemic (limited) to California.
Record Count by County

Alameda: 35 Marin: 7 San Benito: 14 Sonoma: 5
Amador: 3 Mariposa: 6 San Bernardino: 70 Stanislaus: 6
Butte: 36 Mendocino: 2 San Diego: 500 Sutter: 10
Calaveras: 3 Merced: 8 San Francisco: 12 Tehama: 8
Contra Costa: 48 Monterey: 129 San Joaquin: 10 Tulare: 12
El Dorado: 7 Napa: 3 San Luis Obispo: 117 Tuolumne: 2
Fresno: 34 Nevada: 1 San Mateo: 16 Ventura: 173
Kern: 28 Orange: 305 Santa Barbara: 211 Yolo: 5
Kings: 5 Placer: 14 Santa Clara: 30 Yuba: 6
Lake: 2 Plumas: 14 Santa Cruz: 44
Los Angeles: 458 Riverside: 123 Shasta: 6
Madera: 19 Sacramento: 42 Solano: 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: 03/15/2026).