Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge
38. Carex microptera Mack.
Tufted with short rootstocks; culms sharply trigonous, 3-10 dm long,
surpassing the leaves. Leaves 2-6 mm wide; sheaths white hyaline ventrally.
Spikes bisexual, gynaecandrous, 4-10, closely aggregated in an oblong
to ovoid or suborbicular head 10-22 mm long; bracts much reduced, awn-tipped;
pistillate scales light to dark brown with a light midrib, acute to obtuse,
narrow and shorter than the perigynia. Perigynia light green to light
brown, membranous, plano-convex, ovate-lanceolate to lanceolate, 3.5-5 mm long,
1-2 mm wide, several-nerved dorsally, few- to several-nerved near the base ventrally,
strongly wing-margined to the base, tapering to the dark brown beak; beak terete,
serrulate, ca. 1/2 the entire length of the perigynium, obliquely cut dorsally,
bidentulate; achenes lenticular, 1-1.5 mm long; stigmas 2. Jun--Jul.
Wet meadows, stream banks and springs at moderate elevations in the Black Hills
where it is common; (Alta. to B.C., s to SD, NM and CA; Mexico).
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