Carex atratiformis Britton
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Cyperaceae
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Scientific Name
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Description
Species Description - Tufted, phyllopodic, 3–9 dm; main lvs 2–5 mm, much shorter than the slender stems; terminal spike mostly pistillate; lateral spikes 2–5, short-cylindric, 1–2 cm, spreading or drooping, often with a few basal staminate fls; peduncles slender, the lower 1–4 cm, the upper shorter; lowest bract lf-like, about equaling the infl, the upper very small; pistillate scales ovate to oblong, as wide and long or a little longer than the perigynia, dark brown throughout, acute to minutely cuspidate; perigynia elliptic, much flattened, 2.6–3.9 mm, half to two-thirds as wide, sharp-edged at the 2 ribs, otherwise nerveless or nearly so, rounded above to a very short, shallowly bidentate beak. Open meadows and exposed ledges; Lab. to Yukon, s. to the mts. of N. Engl. and the vicinity of Lake Superior.