Common names: Illyerian thistle
Onopordum illyricum (Illyerian thistle) is a biennial herb/ (family Asteraceae) with purple flowers and prickly toothed leaves found in the central coast ranges of California. It is native to southeastern Europe. It favors grasslands and riparian and bottomland habitat. It spreads via seeds equipped with fine hairs. The seeds spread via wind, water, wool, vehicles and clothing.Rating: Watch
- Plant Risk Assessment - An evaluation of the potential for a plant to be invasive in California.
- Cal-IPC News - Our quarterly newsletter. Each issue is available as a pdf.
- Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium.
- Don't Plant a Pest! - Select your region to find non-invasive alternatives to ornamental species. Also see our statewide brochure on trees.
None for this species.