Bromus japonicus

Photo: Joseph DiTomaso

Synonyms: Bromus abolini Drob., Bromus chiapporianus de Not. Ex Nyman, Bromus commutatus Schrad., Bromus cyri Trin., Bromus gedrosianus Penzes, Bromus japonicus ssp. anatolicus (Boiss. & Heldr.) Penzes, Bromus japonicus Thunb. ex Murr. var. porectus Hack., Bromus japonicus var. susquarrosus (Borb.) Savul. & Rays, Bromus multiflorus DC. ex Lam. & DC, Bromus patulus Mert. & Koch, Bromus pendulus Schur. Bromus unilateralis Schur., Bromus vestitus Schrad.

Common names: Japanese brome; Japanese chess

Bromus japonicus (Japanese brome, Japanese chess) is a cool season annual grass (family Poaceae) commonly found in Northern California. This grass out-competes native grasses in areas where grazing and fire have been reduced.

Cal-IPC Rating: Limited?

CDFA Rating: None?


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 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

There are no newsletter articles associated with this species yet.

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

Other Bromus japonicus Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Bromus_japonicus_Japanese brome_Patrick Alexander_cropped
    Bromus japonicus (Japanese brome) inflorescence. Photo: Patrick Alexander
    Bromus japonicus_leaf blade and sheath_SteveMatson
    Bromus japonicus (Japanese brome) leaf blade and sheath. Photo: Steve Matson
    Bromus japonicus_inflorescence(mature)_copyright2020_MaeveHenwood(SierraPacificIndustries)
    Bromus japonicus (Japanese brome) inflorescence (mature). Photo: &#169 2020 Maeve Henwood, Sierra Pacific Industries
    Bromus japonicus_growth habit_copyright2020_MaeveHenwood(SierraPacificIndustries)
    Bromus japonicus (Japanese brome) growth habit. Photo: &#169 2020 Maeve Henwood, Sierra Pacific Industries