Setaria utowanaea (Scribn.) Pilg.

Panicum utowanaeum Scribn. in Milisp. Field Columb. Mus
Publ. Bot. 2: 25. 1900.
Panicum Sintenisii Nash, Bull. Torrey Club 30: 382. 1903.
Plants tufted from the nodes of short, slender rootstocks, glabrous; culms ascending or somewhat spreading, 25-60 cm. high, slender, compressed, sparingly branching; leaf-sheaths
i
shorter than the internodes, compressed, especially the lowermost, ciliate at the auriculate summit; ligule a minute ring of stiff hairs; blades erect or spreading above, 10-20 cm. long, 1-4 mm. wide, slightly scabrous on the margin (sometimes sparsely pilose on the upper surface at the base), narrowed and more or less involute at the base and much narrower than the sheath; panicles 3-10 cm. long, very slender, the scattered, erect branches 1-3 cm. long, the bristle usually equaling or exceeding the spikelet; spikelets subsessile, 2-2.1 mm. long, 0.6-0.7 mm. wide, elliptic, somewhat beaked at the summit, glabrous, pale with green nerves; first glume half as long as the spikelet, acute, 3 -nerved; second glume two thirds to three fourths as long as the fruit, 3-5-nerved, the sterile lemma 5-nerved, abruptly pointed; fruit 1.9 mm. long, 0.6 mm. wide, elliptic, minutely rugose, slightly beaked at the acute apex.
Type locality: Guanica, Porto Rico.
Distribution: Cuba, Hispaniola, Porto Rico, and Guadeloupe; also in Venezuela.