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Plant Profile  
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Common Name: Japanese Brome

Other Names: Japanese Chess

Species Name: Bromus japonicus

Plant Type: Grasses & Grass-like

Family Name: Poaceae






Plant Facts  
Origin Introduced, Europe
Duration Winter Annual
Season Cool
Distribution in the U.S. NE, SD, ND, KS, OK, TX, MN, IA, MO, MT, WY, CO, NM, AB, SK, MB
Distribution in Oklahoma Throughout the state



ID Characteristics

  • Field Identification Characteristics
    • Spikelet: Florets 6-11 (15-25 millimeters long); lemmas broad (7-9 millimeters long, hairless, and split or lobed near the tips
    • Inflorescence: Panicle (8-20 centimeters long), open; branches flexuous, slender
    • Awns: Lemma of upper florets awned (8-13 millimeters long) awns become twisted and bent at maturity
    • Glumes: Unequal; first glume 4-6 millimeters long, second glume 6-8 millimeters long; broad, awnless
  • Leaf and Stem Characteristics
    • Sheath: Shaggy, densely hairy with long hairs.
    • Leaf Blade Shape: Flat (7-20 centimeters long, 1-7 millimeters wide), densely hairy or velvety, midvein prominent
    • Ligule: Membranous (less than 2 millimeters long), rounded



Soil Type Sand, silt and clay
Habitat Widespread on disturbed sites, waste areas, cropland and rangeland in low condition
Successional Stage Early, but invades all stages


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