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Montana Field Guide

Montana Field Guides

Blackroot Sedge - Carex elynoides

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 6

External Links

General Description
Densely caespitose. Stems erect, 3–12 cm with old leaf sheaths at the base. Leaves basal and lower-cauline; blades ca. 0.5 mm wide. Inflorescence a solitary bractless spike. Spike narrow, 8–18 mm long; male flowered portion usually >5 mm long; female flowers below male. Perigynia obovoid, 2.5–4 mm long, brown, with an entire beak 0.5 or more mm long and sometimes a few hairs above; stigmas 3. Female scales brown with hyaline margins, mostly larger than 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
MT south to NV, UT and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 100

(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)


  • Additional ReferencesLegend:   View Online Publication
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    • 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.
    • Wiman, N.G. 2001. Dynamics of leafy spurge (Euphorbia esula L.) infested plant communities influenced by flea beetles in the Aphthona complex (Colepotera: Chrysomelidae). M.Sc. Thesis. Bozeman, MT: Montana State University. 148 p.
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Citation for data on this website:
Blackroot Sedge — Carex elynoides.  Montana Field Guide.  .  Retrieved on , from