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Montana Field Guide

Montana Field Guides

Blunt Sedge - Carex obtusata

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Rhizomatous. Stems erect, 3–15 cm, solitary. Leaves basal and lower-cauline; blades 0.5–2 mm wide. Inflorescence a solitary bractless spike. Spike narrow, 5–12 mm long; male flowered portion 3–8 mm long; female flowers below, few. Perigynia ovoid, ribbed, 2–3 mm long, purplish, with a distinct, entire, bidentate beak 0.5–1 mm long; stigmas 3. Female scales hyaline with a tan center, apiculate, nearly concealing the perigynia. Achene 3-sided, filling the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Montana Range


Range Comments
Circumboreal south to UT, NM, SD and MN (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 155

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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

Mesic grasslands, meadows, turf, fellfields; valleys to alpine, more common lower (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

  • Additional ReferencesLegend:   View Online Publication
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    • Jones, W. W. 1901. Preliminary flora of Gallatin County. M.S. Thesis. Bozeman, MT: Montana State College. 78 pp.
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Williams, K.L. 2012. Classification of the grasslands, shrublands, woodlands, forests and alpine vegetation associations of the Custer National Forest portion of the Beartooth Mountains in southcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 376 p.
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Citation for data on this website:
Blunt Sedge — Carex obtusata.  Montana Field Guide.  .  Retrieved on , from