Aegilops triuncialis

Aegilops triuncialis_barb goatgrass_ JM Di Tomaso
Photo courtesy Joseph DiTomaso

Common names: barb goatgrass, barbed goatgrass

Aegilops triuncialis (barb goatgrass) is an annual grass (family Poaceae) that grows in rangelands, grasslands, and oak woodlands. It is becoming a dominant grass in foothill grasslands of central California. This weed can directly injure livestock by lodging in their eyes or mouths, and is unpalatable to cattle.

Cal-IPC Rating: High

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.

Special Reports

Barb Goatgrass - University of California, Agriculture and Natural Resources Peer-Reviewed Publication 8315

Weed RIC 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

Cal-IPC Symposium Presentations

  • Carey, C. and S. C. Hart (2011). Alteration of nitrogen cycling processes by exotic annuals in a California grassland. Cal-IPC 2011 Symposium. Tahoe City, CA, California Invasive Plant Council.
  • Aigner, P. A. and R. J. Woerly (2010). Control of barbed goatgrass in serpentine grasslands. Cal-IPC 2010 Symposium. Ventura, CA, California Invasive Plant Council.
  • Morrison, E., A. Battaglia, et al. (2010). The effects of climate change on the growth of Barbed Goatgrass (Aegilops triuncialis) in serpentine grasslands. Cal-IPC 2010 Symposium. Ventura, CA, California Invasive Plant Council
  • Eviner, V., K. J. Rice, et al. (2009). Controlling the invasion of noxious rangeland weeds into an exotic-dominated grassland: Is there a role for native grass reseeding? . Cal-IPC Symposium. Visalia, CA Cal-IPC.
  • DiTomaso, J. M. (2005). Efficacy and safety of new herbicides on the horizon. California Invasive Plant Council Symposium 2005. Chico, CA.
  • Clines, J., J. DiTomaso, et al. (2004). Grasses working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
  • Gelbard, J. L. and S. Harrison (2001). Interactive effects of roads, soils, and exposure on invasion of Calif. grasslands. California Exotic Pest Plant Council Symposium 2001. San Diego, CA.
  • DiTomaso, J. M., A. Merenlender, et al. (2000). Control of barbed goatgrass using prescribed burning. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Thomsen, C. D. (2000). Bear Creek watershed restoration program. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
  • Thomsen, C. D., W. A. Williams, et al. (1996). Yellow starthistle management with grazing, mowing, and competitive plantings. California Exotic Pest Plant Council Symposium '96. San Diego, CA.

Other Aegilops triuncialis 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.
  • GBIF - Global distribution information.