Herbs, perennial. Culms tufted, naked but clothed at base with a few bladeless ligulate leaf sheaths. Leaf blade much reduced. Involucral bract 1, glumelike, suberect, apex mucronate or awned. Inflorescences reduced to a single terminal spikelet, rarely an anthela or capitate with a few spikelets. Spikelets ellipsoid. Glumes pale brown, spirally arranged, membranous, deciduous, all bearing a bisexual flower in axil. Flower bisexual or unisexual. Perianth bristles 6, filiform, silky, usually much elongated after anthesis and overtopping subtending glume. Stamens 2 or 3 or 6. Style base not distinct, slightly thickened, ± persistent. Nutlet obovoid, 3-sided or dorsiventrally compressed, smooth, apex slightly beaked.
Herbs, perennial, cespitose, rhizomatous or not. Culms trigonous or terete. Leaves basal or subbasal; sheaths bladeless or distal sheaths with blade to 5 mm, not fibrous; ligules present; blades obsolete or elongate, linear, less than 1 cm × 1 mm. Inflorescences terminal; spikelets 1; involucral bracts 1, suberect, scalelike, apex mucronate or awned. Spikelets: scales 3–9, spirally arranged, each subtending flower. Flowers bisexual; perianth of 0–6 bristles, straight, shorter than to about 20 times as long as achene, smooth or scabrous; stamens 3; styles linear, 3-fid, base persistent. Achenes trigonous or plano-convex.
Beetle, A. A. 1947. Scirpus L. section Baeothryon (A. Dietr.) Reichenb. In: N. L. Britton et al., eds. 1905+. North American Flora…. 47+ vols. New York. Vol. 18, pp. 493–495. Fernald, M. L. 1943b. Studies in North American species of Scirpus. Rhodora 45: 279–296.
|Club-rush, trichophore [Greek tricho-, hair, and phorum, carrier or stalk]|