glabrous; rhizome (seen) hardly 1 in. long, very stout; stems 5–11 in. long, stout, rigid, each with 1 dense compound head; leaf-sheaths pale-brown, torn, uppermost bearing a leaf; leaves 1/3– 2/3 the length of the stem, very rigid, 1/16 in. wide at the base, channelled, but nearly solid, triquetrous for their whole length; bracts 3–5 (head evidently compound), green or yellowish, lowest up to 2 1/2 in. long, dilated at the base with green margins, above the base similar to the leaves, very rigid; head 3/5 in. in diam.; glumes more than 1/4 in. long, oblong-lanceolate, upper male or empty, scarious; stamens 3; anthers long, linear, with short linear-lanceolate white crests; nut 2/5 the length of the glume (i.e. large for the genus), obovoid, obtuse, smooth, black, microscopically marked transversely with undulating lines; gynophore short, obpyramidal. null