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Montana Field Guide

Montana Field Guides

Roughleaf Ricegrass - Oryzopsis asperifolia

Native Species

Global Rank: G5
State Rank: S4
C-value: 5


Agency Status
USFWS:
USFS:
BLM:


 

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General Description
Stems 20–60 cm tall, erect to widely spreading. Leaves: blades mostly 5–9 mm wide, scabrous, ligules 0.5–1 mm long. Inflorescence a raceme or narrow panicle 3–11 cm long. Spikelets 6–8 mm long. Lemmas sparsely hairy, with a deciduous awn 6–12 mm long. Dry meadows and open understory (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Across northern U.S., throughout the Rocky Mountain States, and across much of Canada excepting the extreme northern latitudes (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: 268

(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

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?
    • 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:
Roughleaf Ricegrass — Oryzopsis asperifolia.  Montana Field Guide.  .  Retrieved on , from