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Montana Field Guide

Montana Field Guides

Japanese Brome - Bromus japonicus

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 0

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General Description
Annual bunchgrass. Stems 20–60 cm. Leaves: blades 2–4 mm wide. Inflorescence an open panicle 10–20 cm long, the branches drooping to one side and at least some flexuous, each branch bearing several spikelets. Spikelets 8–13 mm long, with 5 to 11 florets. Lemmas broad; awn 2–6 mm long, straight to curved downward at maturity (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Unknown/Undetermined
 


Range Comments
Introduced throughout nearly all of North America (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 156

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
Roadsides, pastures, overgrazed sagebrush steppe, sites with strongly fluctuating water levels, and other open disturbed dry sites (Lavin in Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Additional ReferencesLegend:   View Online Publication
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    • Lesica, P., M. T. Lavin, and P. F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Whisenant, Steven G. 1990. Postfire population dynamics of Bromus japonicus. American Midland Naturalist. 123: 301-308.
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Citation for data on this website:
Japanese Brome — Bromus japonicus.  Montana Field Guide.  .  Retrieved on , from