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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

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

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: 2

(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
Fields, roadsides, disturbed areas.

References
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Citation for data on this website:
Spiked Brome — Bromus racemosus.  Montana Field Guide.  .  Retrieved on , from