Montana Field Guide

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Montana Field Guides

Home - Other Field Guides
- Kingdom - Plants - Plantae
  - Division - Flowering Plants - Anthophyta
    - Class - Monocots - Monocotyledoneae
      - Order - Grasses/Sedges - Cyperales
        
        Family - Grasses - Poaceae
        
        Species - Roughleaf Ricegrass - Oryzopsis asperifolia

Roughleaf Ricegrass - Oryzopsis asperifolia

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Native Species

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

Agency Status
USFWS:
USFS:
BLM:

External Links

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: 266

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Relative Density

Recency

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

Habitat

Dry meadows and open understory (Lavin in Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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. Montana Natural Heritage Program. Retrieved on April 20, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=PMPOA4J010