Herbs, erect, caespitose or rhizomatous. Culms cylindrical, quadrangular, or slightly to evidently trigonous in cross section, Septate or not. Leaves reduced to sheaths at the base of the Culm (Leaf blade absent), sheaths membranaceous or coriaceous. Inflorescence a single spikelet at Culm Apex; involucral bracts absent Spikelets globose, ovoid, ellipsoid or lanceoloid; sometimes dimorphic. Glumes persistent or deciduous, spiral, distichous or subdistichous; lower Glumes fertile or sterile. Perianth bristles, present or absent. Rudimentary 1-3. Stamens Stigma or Bifid. Trifid Achene Biconvex or trigonous, smooth or reticulate, white to black; Stylopodium or not with the rest of the confluent body ...
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