Synonyms: B. rigidus, B. rigidus var gussonei, B. gussonei
Common names: ripgut brome; great brome; ripgut grass
Bromus diandrus (ripgut brome) is an annual grass (family Poaceae) found throughout California and other western states. Ripgut brome is one of several European annual grasses that have displaced much of the native grass throughout California. Ripgut brome becomes very dry and flammable during the dry season, increasing wildfire frequency. Increased wildfire frequency leads to conversion of shrubland and woodland to grassland. Ripgut brome is reported to hybridize with two other invasive grasses: downy brome (Bromus tectorum) and red brome (Bromus madritensis). Brome seeds may spread great distances via water and soil movement and by clinging to animals and people.Cal-IPC Rating: Moderate
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.
Cal-IPC Newsletter Articles
- The butterfly effect. Trumbo, Joel. Vol 20, Issue 2
- USFWS and PG&E partner to protect species. Terrazas, Louis. Vol 20, Issue 1
- “Conservation Across Borders” in San Jose. Cal-IPC. Vol 14, Issue 2
- Exploring alternative methods for vegetation control and maintenance along roadsides. Young, Steve L.. Vol 10, Issue 4
- The use of fire for yellow starthistle (Centaurea solstitialis) management and restoration of native grasslands at Sugarloaf Ridge State Park. Hastings, Marla; DiTomaso, Joe. Vol 04, Issue 1
- Portrait of an invader II: The ecology and management of Carpobrotus edulis. Albert, Marc E.. Vol 03, Issue 2
- Control of exotic plants in an herbaceous understory. Perala, Christine; Hoover, Doris A.; Parra-Szijj, E.A.. Vol 01, Issue 3
Cal-IPC Symposium Presentations
- Dedon, M. F., M. E. Fry, et al. (2010). Pacific Gas and Electric Company's use of Safe Harbor agreements to enhance habitat for endangered species in the San Francisco Bay Area. Cal-IPC 2010 Symposium. Ventura, CA, California Invasive Plant Council.
- Emam, T., B. Pavlik, et al. (2008). Soil biota facilitate invasion within microhabitats in a California coastal prairie. California Invasive Plant Council Symposium 2008. Chico, CA, California Invasive Plant Council.
- Hulvey, K. and E. Zavaleta (2006). The effect of native forb abundance on invasion resistance in California grasslands. Cal-IPC Symposium. Rohnert Park, CA.
- Clifford, P., A. J. Pickart, et al. (2005). Invasive annual grasses in a coastal dune ecosystem. California Invasive Plant Council Symposium 2005. Chico, California, CA.
- DiTomaso, J. M. (2005). Efficacy and safety of new herbicides on the horizon. California Invasive Plant Council Symposium 2005. Chico, CA.
- Maher, E. and E. Stanton (2005). Blurring edges: A test of weed control methods used along edges of sage scrub patches to encourage shrub colonization into abandoned agricultural fields. California Invasive Plant Council Symposium 2005. Chico, CA.
- Clines, J., J. DiTomaso, et al. (2004). Fire working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
- Clines, J., J. DiTomaso, et al. (2004). Grasses working group. California Invasive Plant Council Symposium 2004. Ventura, CA.
- Corbin, J. D., M. Thomsen, et al. (2004). Out of the frying pan: Invasion of exotic perennial grasses in coastal prairies. California Invasive Plant Council Symposium 2004. Ventura, CA.
- Minnich, R. A. (2004). Californias fading wildflower legacy. California Invasive Plant Council Symposium 2004. Ventura, CA.
- DiTomaso, J. (2003). Fire: Prescribed burning as a management tool. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
- Pickart, A. (2003). A decade of dune restoration at the Lanphere Dunes. California Invasive Plant Council Symposium 2003. Kings Beach, CA.
- White, V. A. and J. S. Holt (2002). Effect of competition on artichoke thistle, Cynara cardunculus. California Exotic Pest Plant Council Symposium 2002. Sacramento, California, CA.
- White, V. A. and J. S. Holt (2001). Emergence and development of Cynara cardunculus: Developing seedling removal strategies for an invasive weed. California Exotic Pest Plant Council Symposium 2001. San Diego, CA.
- Uschyk, K. L. and P. Slattery (2000). The use of native yellow lupines for controlling ripgut brome and radish. California Exotic Pest Plant Council Symposium 2000. Concord, CA.
- Hillman, J. M. (1999). Potentially allelopathic effects of poison hemlock (Conium maculatum) on native plant revegetation at Wilder Ranch State Park. California Exotic Pest Plant Council Symposium '99. Sacramento, CA.
- Sanders, A. C. (1998). Invasive exotics in California: A perspective from inland Southern California. California Exotic Pest Plant Council Symposium '98. Ontario, CA.
- Hastings, M. S. and J. M. DiTomaso (1996). Fire controls yellow starthistle (Centaurea solstitalis) in California grasslands. California Exotic Pest Plant Council Symposium '96. San Diego, CA.
- 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.
- Young, J. A. and R. R. Blank (1995). Cheatgrass and wildfires in the intermountain west. California Exotic Pest Plant Council Symposium '95. J. Lovich, J. Randall and M. Kelly. Pacific Grove, CA.
- Minnich, R. A. (1994). Effects of exotic plants on three California ecosystems. California Exotic Pest Plant Symposium '94. Sacramento, CA.
- Wills, R. (1993). The effects of fire on introduced annual grasses. California Exotic Pest Plant Symposium '93. Westlake Village, CA.
Other Bromus diandrus Information
- CalPhotos - Images of plants taken mostly in California.
- CalFlora - Distribution information based on submitted observations and herbarium specimens.
- 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.