Herbs, perennial, cespitose, shortly rhizomatous. Culms trigonous, 20-50(-85) cm × 1-2(-4) mm, glabrous. Leaves 3-6(-10), 10-40(-55) cm × 1.5-4(-5) mm, V- to inversely W-shaped. Inflorescence: spike 1, densely oblong-ovoid often with small basal branches, 8-16 × 4-12(-16) mm; rays 4-8(-11), 0.5-3.5(-8.5) cm; bracts (3-)4-6(-10), ascending at (30-)45°, flat to broadly V-shaped, (4-)14-30(-55) cm × 1-5 mm, scabridulous along margins only; rachilla deciduous, wings persistent, 0.2-0.3 mm wide. Spikelets 40-120, oblong-lanceoloid, subterete, 2.2-4(-4.5) × 0.8-1.6 mm; distal spikelet spreading or ascending; floral scales persistent, 2-5, appressed, brown to stramineous, or fuscous and lustrous, medially greenish and 1(-3)-ribbed, laterally greenish to yellowish white and 3-4-ribbed, oblong to oblong-lanceolate, 1.8-2.5 × 1-1.5 mm, subcoriacous. Flowers: anthers 0.3-0.5 mm; styles 0.5-0.8 mm; stigmas 0.6-0.9 mm. Achenes brown, oblong-ellipsoid, 1.2-1.7 × 0.5-0.6 mm, base cuneate, apex subacute, surfaces papillose. Fruiting summer (Jun-Aug). Open woods and thickets in moist to dry, sandy soils; 0-1000 m; Ala., Ark., Del., D.C., Fla., Ga., La., Md., Miss., Mo., N.J., N.Y., N.C., Okla., S.C., Tenn., Tex., Va.; Mexico (Tamaulipas). Cyperus retrorsus was reported in Indiana (M. L. Horvat 1941); we have been unable to confirm the report.