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Montana Field Guide

Montana Field Guides

Black-and-white Scale Sedge - Carex albonigra

Native Species

Global Rank: G5
State Rank: S4S5

Agency Status
MNPS Threat Rank:
C-value: 5

External Links

General Description
Caespitose. Stems erect, 8–25 cm. Leaves basal and lower-cauline; blades 2–5 mm wide. Inflorescence of 2 to 4 short-pedunculate, erect spikes forming a tight cluster; lowest bract inconspicuous. Spikes 8–15 mm long, terminal largest; male flowers basal. Perigynia erect, purplish-black, elliptic, 2–4 mm long, including the short beak, scabrous on the margins; stigmas 3. Female scales dark brown to black with light margins, as long as but narrower than the perigynia. Achene 3-sided, partly filling the perigynium (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
AK to NT south to CA, AZ and NM (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 18

(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)


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Citation for data on this website:
Black-and-white Scale Sedge — Carex albonigra.  Montana Field Guide.  .  Retrieved on , from