Aegilops triuncialis (barb goatgrass)

Aegilops triuncialis

Photo courtesy Joseph DiTomaso

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 Inventory rating: High

Cal-IPC Resources on Aegilops triuncialis

• California Invasive Plant Inventory Assessment Form (pdf) - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.
• Cal-IPC News - Articles from our quarterly newsletter. (None for this species.)
• Cal-IPC Symposium Proceedings - Presentations and papers from our annual Symposium. List of articles on Aegilops triuncialis.
• California distribution map. - Maps based on survey data from county Weed Management Areas. These maps are the product of those working in the field and are not intended to be definitive.

Cal-IPC News Articles

• None for this species.

Cal-IPC Symposium-Proceedings

• 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 Resources on Aegilops triuncialis

• 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.
• Encycloweedia - Plants rated as noxious weeds by the California Department of Food and Agriculture.
• CalPhotos - Images of plants taken mostly in California.
• Natural Resource Projects Inventory - State database with information on resource management projects throughout California. Query by the species of interest.

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