Hypochaeris radicata (rough catsear, hairy dandelion)

Hypochaeris radicata

Photo courtesy Joseph DiTomaso

Hypochaeris radicata (rough catsear, hairy dandelion) is an annual herb/forb (family Asteraceae) and a weed of lawns, pastures, and waste areas. The seeds are wind blown and can rapidly invade disturbed areas.

Cal-IPC Inventory rating: Moderate

Cal-IPC Resources on Hypochaeris radicata

• California Invasive Plant Inventory Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
• CalWeedMapper - Statewide maps, climate models, and reports.
• Cal-IPC News - Articles from our quarterly newsletter. Each issue is available as a pdf. List of articles on Hypochaeris radicata.
• Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. List of articles on Hypochaeris radicata.

Cal-IPC News Articles

• Young, S. L. (2002). Exploring alternative methods for vegetation control and maintenance along roadsides. CalEPPC News. 10: 5-7.

Cal-IPC Symposium Proceedings

• Giessow, J. and P. Zedler (1996). The effects of fire frequency and firebreaks on the abundance and species richness of exotic plant species in coastal sage scrub. California Exotic Pest Plant Council Symposium '96. San Diego, CA.

Other Resources on Hypochaeris radicata

• USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
• Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
• CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
• The Nature Conservancy Management Summary - Information compiled by TNC land managers. Photos included for some species.
• CalPhotos - Images of plants taken mostly in California.

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