Black and Purple Sedge -
Carex luzulina var. atropurpurea
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Native Species Global Rank
State Rank Reason below) C-value
Agency Status USFWS
State Rank Reason (see State Rank above)
This variety has been collected from five counties in the southwestern Monana mountains.
This is a perennial plant with clumped stems reaching 15-60 dm in height. Leaves are crowded near the base with flat blades that are 2-4 mm wide. The lower spikes are pistillate, 1-3 cm long, and are borne on erect stalks. Scales of the pistillate spikes are blackish or brownish-purple and pointed at the tip; the perigynia are pubescent with three stigmas and develop into three-sided achenes. The terminal spike is staminate, at least at the top.
Plants are fertile in July and August.
The other variety of this species in Montana
, C. luzulina var. ablata, has wider leaf blades and round-tipped, greenish, straw-colored, or reddish brown pistillate flower scales. The similar C. misandra has drooping spikes on slender stalks and pistillate flowers located above the staminate ones.
Regional endemic of eastern Idaho, southwestern Montana, and western Wyoming.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Subalpine wet meadows and streamsides.
Legend: View Online Publication Do you know of a citation we're missing? Heidel, B. L. 1996. Noteworthy collections - Montana. Madrono 43(3):436-440. Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.