Calflora, a 501c3 non-profit
Distribution by County   1321    
Calycadenia fremontii  A. Gray
Tufted tackweed,   Klamath calycadenia
Calycadenia fremontii is an annual herb that is native to California, and also found elsewhere in western North America.
Record Count by County

Butte: 34 Marin: 1 Siskiyou: 10 Tuolumne: 6
Colusa: 6 Mendocino: 15 Solano: 1 Yuba: 2
Glenn: 2 Modoc: 8 Sonoma: 2
Humboldt: 1 Napa: 4 Tehama: 202
Lake: 128 Shasta: 190 Trinity: 37

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: 01/17/2026).