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Montana Field Guides

Giant Wildrye - Elymus condensatus
Other Names:  Leymus condensatus

Non-native Species

Global Rank: G3G4
State Rank: SNA

Agency Status
MNPS Threat Rank:

External Links

General Description
Bunchgrass. Stems 1–3 m tall, forming large patches in which may be found short rhizomes. Leaves: blades up to 30 mm wide, usually flat. Inflorescence 15–50 cm long, the rachis continuous and erect. Spikelets mostly >3 per node, about 15 mm long; glumes narrow, gradually tapering from the base to a narrow, pointed tip, about as long as or longer than the first lemma, veins not evident or with a single vein. Lemmas usually about 5 per spikelet (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Collected in Stillwater County Western North America in BC, AB, CA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 4

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Relative Density



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



  • Additional ReferencesLegend:   View Online Publication
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    • 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.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
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Citation for data on this website:
Giant Wildrye — Elymus condensatus.  Montana Field Guide.  .  Retrieved on , from