California Invasive Plant Council

Trifolium hirtum

Common names: rose clover

Trifolium hirtum (rose clover) is an annual forb/herb (family Fabaceae) commonly found in California, blanketing dry rangelands. Rose clover out competes indigenous clover and native grasses and can tolerate dryer soils and frost. It was intentionally introduced as grassland forage and in most rangeland systems is not considered weedy. However, in wildlands, it can out-compete native clovers.

Cal-IPC Rating: Limited

Cal-IPC Assessment

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.

Weed Management Notes

• Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

• Lessons learned after the San Diego County fires. Martus, Carolyn; Schneider, Carrie. Vol 11, Issue 4

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

• Does horse manure harbor invasive plants? Quinn, Lauren; Davis, Bonnie; Kolipinski, Mietek; Ghosh, Sibdas (2006)
• Risk analysis of various weed control methods. DiTomaso, Joseph M. (1997)

Other Trifolium hirtum Information

• CalPhotos - Images of plants taken mostly in California.
• Calflora - See the distribution of this species on Calflora's map of California.
• CalWeedMapper - Distribution information with ability to determine regional priorities.
• Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
• USDA PLANTS Database - Federal database with information on identification and distribution, and links to websites in individual states.