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Montana Field Guide

Montana Field Guides

Rye Brome - Bromus secalinus

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Non-native Species

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


Agency Status
USFWS:
USFS:
BLM:


 

External Links

 
General Description
Annual bunchgrass. Stems 30–60 cm. Leaves: blades 4–8 mm wide. Inflorescence a nodding panicle 7–12 cm long. Spikelets 10–15 mm long, with 5 to 8 florets. Lemmas with a straight or down-curved awn 10–20 mm long (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Rye Brome - Bromus secalinus, exotic and undesirable
*Spikelets twisted, not purplish-tinged, and with distinct lemmas separated enough to expose the rachilla and
*Anthers 1-2 mm long and
*Lower leaf sheaths glabrous or loosely pubescent and glabrate.

Field Brome - Bromus arvensis, exotic, undesirable, and NOT documented in Montana
*Spikelets purplish-tinged and
*Anthers 2.5-5 mm long and
*Lower leaf sheaths with soft appressed hairs.

Japanese Brome - Bromus japonicus, exotic and undesirable
*Spikelets not purple-tinged and with close together lemmas that cover the rachilla and
*Anthers 1-1.5 mm long and
*Lower leaf sheaths are usually densely pilose.

Species Range
Montana Range Range Descriptions

Non-native
 


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

Observations in Montana Natural Heritage Program Database
Number of Observations: 19

(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
Disturbed sites, roadsides, and overgrazed rangelands (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Management

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Brey, C.W. 1998. Epidemiology of wheat curl mite (Aceria tosichella K.) and wheat streak mosaic virus on feral grass species and effect of glyphosate on wheat curl mite dispersal. Ph.D. Dissertation. Bozeman, MT: Montana State University. 136 p.
    • Carroll, M.W. 1998. Influence of a legume covercrop on volunteer wheat, the wheat curl mite, Aceria tosichella (K.) and wheat streak mosaic virus. M.Sc. Thesis. Bozeman, MT: Montana State University. 78 p.
    • Ito, D. 2011. Evaluation of susceptibility to wheat streak mosaic virus among small grains and alternative hosts in the great plains. M.Sc. Thesis. Bozeman, MT: Montana State University. 93 p.
    • Joslin, G.J. 1975. Behavior and environmental selection by Elk (Cervus canadensis nelsoni) during surrmer and fall in the First and Second Yellow Mule drainages, Madison County, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University, Bozeman. 65 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.
    • Quire, R.L. 2013. The sagebrush steppe of Montana and southeastern Idaho shows evidence of high native plant diversity, stability, and resistance to the detrimental effects of nonnative plant species. M.Sc. Thesis. Bozeman, MT: Montana State University. 124 p.
  • Web Search Engines for Articles on "Rye Brome"
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Citation for data on this website:
Rye Brome — Bromus secalinus.  Montana Field Guide.  .  Retrieved on , from