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Montana Field Guide

Montana Field Guides

Spiked Brome - Bromus racemosus
Other Names:  Bald Brome

Non-native Species

Global Rank: GNR
State Rank: SNA
C-value: 1

Agency Status


External Links

General Description
Annuals, culms 20-110 cm. Lower sheaths densely stiff-hairy, often retrorse; upper sheaths glabrous or pubescent; ligules 1-2 mm, glabrous or hairy, erose; blades 7-19 cm long, 1-4 mm wide, pilose on both surfaces. Panicles 4-16 cm long, 2-3 cm wide, erect, open. Spikelets 12-20 mm long, terete to moderately compressed; florets 5-6. Lower glumes 4-6 mm long, 3(5)-veined; upper glumes 4-7 mm long, 7-veined; lemmas 6.5-8 cm lon, distinctly 7(9)-veined, tips acute to obtuse with two short teeth; awns 5-9 mm, arising less than 1.5 mm below apex; anthers 1.5-3 mm (adapted from: Pavlick & Anderton, 2007, Flora N. America, Vol. 24).

Range Comments
Native to Europe and the Baltic region; throughout much of southern Canada and USA (Pavlick & Anderton, 2007, Flora North America, Vol. 24).

Observations in Montana Natural Heritage Program Database
Number of Observations: 16

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



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

Fields, roadsides, disturbed areas.


  • 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.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
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Citation for data on this website:
Spiked Brome — Bromus racemosus.  Montana Field Guide.  .  Retrieved on , from