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Montana Field Guide

Montana Field Guides

Rocky Mountain Sedge - Carex backii

Status Under Review
Native Species

Global Rank: G5
State Rank: S1S3

Agency Status


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General Description
Caespitose. Stems erect, 14–25 cm. Leaves basal and lower-cauline, some greater than the inflorescence; blades 1–5 mm wide, yellowish. Inflorescence of 1 to 4 well-separated spikes; lowest bract greater than the inflorescence. Spikes bisexual, similar, erect to ascending, pedunculate, 5–10 mm long not including the basal female scales; male flowers above, few, inconspicuous. Perigynia 2 to 5, ascending, green, obovoid, glabrous, loosely aggregated, 5–6 mm long, tapered to the smooth 2–3 mm long beak; stigmas 3. Female scales green, elongate and bract-like below, ovate, shorter above. Achene 3-sided, filling the perigynium (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Known from Flathead and Stillwater counties; BC to NL south to CO, SD, IL and NY (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 5

(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)


  • 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.
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Citation for data on this website:
Rocky Mountain Sedge — Carex backii.  Montana Field Guide.  .  Retrieved on , from