Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge
32. Carex lanuginosa Michx. -- Woolly sedge
Extensively colonial from scaly rhizomes; culms trigonous, 2-10 dm long.
Leaves 2-5 mm wide; sheaths hyaline ventrally, the lower ones often purple-tinged
dorsally, disintegrating and leaving a loose network of fibers. Spikes
unisexual, the upper 1-3 (usually 2) staminate, 2-6 cm long, the lower 1-3 pistillate,
remote, sessile or nearly so, cylindric, 1-4 cm long; bracts leaflike,
the lowest one usually surpassing the inflorescence; pistillate scales
brown to purplish-brown on the sides, acuminate to awned, shorter to longer
than the perigynia. Perigynia brownish to yellowish-green to grayish-brown,
or sometimes purplish, subterete, oblong-ovoid, 2.5-4(5) mm long, densely pubescent,
many-nerved, contracted into the beak which is 1/4 to 1/3 the entire length
of the perigynium, the beak teeth 0.3-0.8 mm long, divergent; achenes
trigonous with concave sides, 1.7-2 mm long; stigmas 3, the style jointed
with the achene. Jun--Jul. Wet meadows, marshes, shores, stream banks, springs,
ditches and other wet places; common, often abundant; (N.B. and Que. to B.C.,
s to VA, TN, AR, TX and CA). C. lasiocarpa Ehrh., in part.
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