Calflora, a 501c3 non-profit
Distribution by County   4096    
Hemizonia pungens  (Hook. & Arn.) Torr. & A. Gray

(not an active name)
Common spikeweed,   Common tarweed
Hemizonia pungens is an annual herb that is native to California, and endemic (limited) to California.
also called Centromadia pungens
Record Count by County

Alameda: 62 Madera: 14 San Benito: 199 Siskiyou: 1
Butte: 6 Marin: 2 San Bernardino: 23 Solano: 18
Colusa: 7 Mendocino: 2 San Diego: 29 Sonoma: 10
Contra Costa: 32 Merced: 105 San Francisco: 4 Stanislaus: 24
Fresno: 98 Monterey: 102 San Joaquin: 10 Sutter: 6
Kern: 203 Napa: 4 San Luis Obispo: 37 Tehama: 1
Kings: 8 Nevada: 1 San Mateo: 19 Tulare: 82
Lake: 3 Orange: 1 Santa Barbara: 2 Yolo: 19
Lassen: 8 Riverside: 192 Santa Clara: 48
Los Angeles: 17 Sacramento: 14 Santa Cruz: 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]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/04/2024).