glabrous, stolons 0; stem 6–14 in. long, rather slender, trigonous at the top, smooth, much thickened at the base by the inflated coloured leaf-sheaths; leaves nearly as long as the stem, 1/8– 1/6 in. broad, weak; umbel simple; rays 2–7, 1/8–1 1/2 in. long; bracts 3–5, similar to the leaves, lowest 3–5 in. long; spikelets closely spicate, 7–20 in a spike, 1/3 by 1/12 in., 6–10-flowered, scarcely compressed; glumes ovate, strongly 13-nerved, reddish, with an excurrent green mucro; stamens 3–2; anthers linear, not crested; nut nearly half as long as the glume, trigonous, ellipsoid, black; style shorter than the nut, branches 3 linear, longish. null