Calflora, a 501c3 non-profit
Distribution by County   4068    
Hemizonia congesta  DC.  ssp. congesta 
Hayfield tarweed
Hemizonia congesta ssp. congesta is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.2 (rare, threatened, or endangered in CA and elsewhere).
Record Count by County

Alameda: 2 Marin: 90 San Francisco: 1 Sonoma: 94
Butte: 1 Mendocino: 7 San Mateo: 5
Contra Costa: 7 Napa: 2 Santa Clara: 1
Lake: 1 Placer: 1 Solano: 2

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).