annual; stems tufted, 3–15 in. long, setaceous, glabrous; leaves 2/3 the length of the stem, setaceous, nearly glabrous; leaf-sheaths more or less long, white-hairy in their throat; umbel simple or compound, or reduced to one spikelet, 1–8 in. in diam.; bracts shorter than the umbel; spikelets all or mostly solitary, scarcely 1/6 in. long, chestnut-brown; glumes ovate, acute, most minutely pubescent, or glabrous; keel usually green, subexcurrent; stamens often 2; anthers not aristate; nut less than 1/2 the length of the glume, obovoid, obtuse, pale-brown, scarcely transversely undulate; style slender, glabrous, longer than the nut, deciduous, leaving a black-red tubercle on the nut, branches 3, longer than the style. null
