Calflora, a 501c3 non-profit
Distribution by County   10725    
Centaurea nigrescens  Willd.
Tyrol knapweed
Centaurea nigrescens is a perennial herb that is not native to California.
Record Count by County

Del Norte: 2 Humboldt: 5 Shasta: 1 Siskiyou: 28

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: 03/04/2024).