Northern Prairie Wildlife Research Center
Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge
45. Carex sartwellii Dewey
Colonial from long, black rhizomes; culms arising singly or few together,
stiff, sharply trigonous, 3-8 dm long, exceeding the leaves. Leaves 2.5-4
mm wide, few per culm, the lowest much reduced, lacking blades; sheaths
green-striate ventrally, prolonged into a conspicuous hyaline, tubular ligule.
Spikes bisexual or the upper ones often staminate, otherwise androgynous,
aggregate or the lower ones separate, ovoid, 5-10 mm long, in heads narrowly
oblong to conic, 3-6 cm long; bracts reduced, the lower ones sometimes
setaceous and exceeding the spike; scales brown with a prominent green
midvein, acute to cuspidate, about equaling the perigynia. Perigynia
tan to brown, plano-convex, ovate, 2.5-3.5 mm long, ca. 1/2 as wide, finely
nerved on both sides, sharp-edged, tapered into the serrulate, oblique to minutely
bidentate beak which is ca. 1/4 the length of the entire perigynium; achenes
lenticular, 1-1.5 mm long; stigmas 2. Jun--Jul. Wet meadows, marshes,
shores, stream banks and ditches; frequent in the n and e parts, uncommon w;
(NY and Ont. to B.C., s to IN, MO, NE and CO).
Previous Section -- Carex rostrata Stokes ex With.
-- Beaked sedge
Return to Family -- Cyperaceae - The
Next Section -- Carex scoparia Schkuhr ex Willd.
-- Broom sedge