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Table 1.  Plant Profile of Japanese Brome
ImageDescription
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Common Name: Japanese Brome
Other Names: Japanese Chess
Species Name: Bromus japonicus
Plant Type: Grasses & Grass-like
Family Name: Poaceae



Table 2. Plant Facts for Japanese Brome
Habitat/EcologyDescription
OriginIntroduced, Europe
DurationWinter Annual
SeasonCool
Distribution in the U.S.NE, SD, ND, KS, OK, TX, MN, IA, MO, MT, WY, CO, NM, AB, SK, MB
Distribution in OklahomaThroughout 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

Table 3. Plant Facts for Japanese Brome
Habitat/EcologyDescription
Soil TypeSand, silt and clay
HabitatWidespread on disturbed sites, waste areas, cropland and rangeland in low condition
Successional StageEarly, but invades all stages