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Montana Field Guide

Montana Field Guides

Hairy Brome - Bromus commutatus
Other Names:  Meadow Brome, Hairy Chess

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 1

External Links






 
General Description
Annuals, culms 40-120 cm, erect or ascending. Lower sheaths densely stiff-hairy (hairs often retorse); upper sheaths pubescent or glabrous; ligules 1-2.5 mm, glabrous or pilose, obtuse, ciliolate; blades 9-18 cm long, 2-4 mm wide, pilose on both surfaces. Panicles 7-16 cm long, 3-6 cm wide, open, erect to ascending; branches sometimes longer than the spikelets, slender, erect to spreading. Spikelets 14-18(-30) mm, terete to moderately compressed; florets 4-9(11). Lower glumes 5-7 mm, 5-veined; upper glumes 6-9 mm, 7(9)-veined; lemmas 8-11.5 mm long, backs usually glabrous, distinctly 7(9)-veined, margins scabrous or pubescent, awns 3-10 mm, straight, arising less than 1.5 mm below the leema apex; anthers 0.7-1.7 mm. Caryopsis equal to or shorter than the paleas (adapted from: Pavlick & Anderton, 2007, in Flora N. America, Vol. 24).

Species Range
Unknown
 


Range Comments
Native to Europe and the Baltic region; now widespread across North America (Pavlick & Anderton, 2007, in Flora North America, Vol. 24).

Observations in Montana Natural Heritage Program Database
Number of Observations: 26

(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)



Management

References
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Seipel, T.F. 2006. Plant species diversity in the sagebrush steppe of Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 87 p.
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Citation for data on this website:
Hairy Brome — Bromus commutatus.  Montana Field Guide.  .  Retrieved on , from