Taxon  Report   5917    
Onopordum illyricum  L.
Illyrian cottonthistle,  Illyrian thistle
Onopordum illyricum, a dicot, is a biennial herb that is not native to California; it was introduced from elsewhere and naturalized in the wild. There is a high risk of this plant becoming invasive in California according to Cal-IPC.
Observation Hotline
(observation details)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Onopordum
Name Status:
Accepted by JEF + PLANTS

More information about  Onopordum illyricum

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]. 2019. Berkeley, California: The Calflora Database [a non-profit organization]. Available:   (Accessed: Jun 18, 2019).