glabrous; stem 1/4 in. in diam. at the top, obtusely trigonous, smooth; umbel 4 1/2 ft. in diam.; bracts 8–10, exceeding the umbel, 3/4 in. broad, thick, spongy, transversely lineolate, scabrous-edged; ultimate umbels 2–4 in. long, with bracts up to 2 in. long; spikelets innumerable, rather loosely spicate, 1/3 by 1/12 in., 6–10-nutted, pale brown; rhachilla disarticulating below the lowest fertile glume, wings conspicuous, persistent, yellowish; glumes ovate, obtuse, striate, obscurely keeled; nut 1/2 the length of the glume, oblong-ellipsoid, trigonous, black; style shorter than the nut, branches 3 linear, longish. null
