Calflora, a 501c3 non-profit
Distribution by County   4100    
Hemizonia pungens  (Hook. & Arn.) Torr. & A. Gray  ssp. septentrionalis  D. D. Keck

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

Alameda: 47 Lassen: 5 Sacramento: 2 Santa Clara: 44
Butte: 2 Los Angeles: 10 San Benito: 197 Santa Cruz: 4
Colusa: 9 Madera: 1 San Bernardino: 4 Siskiyou: 1
Contra Costa: 23 Marin: 1 San Diego: 4 Solano: 12
Fresno: 33 Merced: 19 San Francisco: 3 Sonoma: 5
Glenn: 3 Monterey: 101 San Joaquin: 7 Stanislaus: 12
Kern: 105 Napa: 3 San Luis Obispo: 30 Sutter: 3
Kings: 4 Nevada: 1 San Mateo: 13 Tulare: 23
Lake: 2 Riverside: 16 Santa Barbara: 1 Yolo: 3

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: 11/21/2024).