Bromus hordeaceus

Bromus hordeaceus_soft brome_ JM Di Tomaso
Photo courtesy Joseph DiTomaso

Synonyms: Bromus confertus Boreau. (B. racemosus and B. scoparious mistakenly used in some older references)

Common names: soft brome; soft chess; lopgrass

Bromus hordeaceus (soft brome) is an annual grass (family Poaceae) distributed at low elevation areas in California, especially in disturbed and open areas. Bromus hordeaceus out competes native grasses and is commonly eaten by range animals, although its forage value is very low. It can invade soils with low fertility, such as the serpentine soils that are home to rare plant species.

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 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

  • Boyd, D. (1995). Use of fire to control French broom. California Exotic Pest Plant Council Symposium '95. J. Lovich, J. Randall and M. Kelly. Pacific Grove, 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.
  • 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.

Other Bromus hordeaceus 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.