Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge
10. Carex buxbaumii Wahl.
Loosely tufted from long rhizomes; culms arising singly or few together,
lateral to previous year's shoots, trigonous, 3-10 dm long, roughened above,
reddish toward the base. Leaves 1-3 mm wide, the lowest ones bladeless;
lower sheaths shredding into filaments, the upper ones membranous and
purple-dotted ventrally. Spikes 2-5, close together or rather remote;
terminal spike gynaecandrous, slightly to considerably larger than the
lateral ones, 1-3 cm long; lateral spikes pistillate, short-cylindric,
sessile or nearly so; bracts leaflike, the lowest shorter than to seldom
surpassing the head; scales dark brown, acute to acuminate, awn-tipped.
Perigynia light green, golden toward the base, flattened or distended
by the achene, elliptic, 2.5-3.5 mm long, slightly more than 1/2 as wide, 2-ribbed,
with 6-8 faint nerves on each face; beak minute, bidentulate; achenes
trigonous, 1.4-2 mm long; stigmas 3. Late May--Jun. Wet meadows, springs
and fens; rare, c ND and nc NE; (Circumboreal, in N.Amer. s to NC, KY, AR, KS,
CO, UT and CA).
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