Calflora, a 501c3 non-profit
Distribution by County   4066    
Hemizonia congesta  DC.  ssp. calyculata  Babc. & H. M. Hall
Hayfield tarweed, Mendocino tarplant
Hemizonia congesta ssp. calyculata is an annual herb that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 4.3 (limited distribution).
Record Count by County

Lake: 9 Mendocino: 48

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: 01/24/2026).