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Montana Field Guide

Montana Field Guides

Ditch reedgrass - Calamagrostis scopulorum

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Status Under Review
Native Species

Global Rank: G5
State Rank: SU
C-value: 4

Agency Status


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General Description
Rhizomatous bunchgrass. Stems 50–80 cm. Leaves: blades 5–7 mm wide. Inflorescence a contracted panicle 6–12 cm long. Spikelets 6–7 mm long. Lemma with a slender straight awn not surpassing the lemma tip, callus hairs >1/2 as long as the lemma (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Throughout the Rocky Mountain states in the U.S. (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: 11

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Relative Density



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


  • 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?
    • Martin, S.A. 1985. Ecology of the Rock Creek bighorn sheep herd, Beartooth Mountains, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 152 p.
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Citation for data on this website:
Ditch reedgrass — Calamagrostis scopulorum.  Montana Field Guide.  .  Retrieved on , from