Calflora
Distribution by County   5917    
Onopordum illyricum  L.
Illyrian cottonthistle,   Illyrian thistle
Onopordum illyricum, a dicot, is a biennial herb that is not native to California.
There is a high risk of this plant becoming invasive in California according to Cal-IPC.
Record Count by County

Santa Clara: 17 Sonoma: 4

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]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 06/30/2022).