Trifolium hirtum

Trifolium hirtum_rose clover_JM DiTomaso
Photo courtesy Joseph DiTomaso

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.

Rating: Limited

Cal-IPC Resources

  • 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 - 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.

    Other Resources

    Symposium Presentations

    • Carrithers, V. F. (1997). Using Transline* herbicide to control invasive plants. California Exotic Pest Plant Council Symposium '97. Concord, CA.
    • DiTomaso, J. M. (1997). Risk analysis of various weed control methods. California Exotic Pest Plant Council Symposium '97. Concord, CA.
    • Quinn, L., B. Davis, et al. (2006). Does horse manure harbor invasive plants? Cal-IPC Symposium. Rohnert Park, CA.

    Cal-IPC News Articles

    • Martus, C. and C. Schneider (2004). Lessons learned after the San Diego County fires. Cal-IPC News. 11: 8-9.