Paspalum denticulatum Trin.

Paspalum lividum Trin.; Schlecht. I^innaea 26 : 383. 1853
A glabrous perennial with flat leaf-blades and glabrous bright-green elliptic spikelets which are much compressed. Stems 6-10 dm. tall; leaf-sheaths compressed, keeled, smooth, glabrous, except on the margins; blades 3 dm. long or less, 3-5 mm. wide, more or less pubescent on the upper sturface; racemes 3-7, erect or ascending, 2.5-5 cm. long, the rachis, which is often setiferous on the margins, about 1.5 mm. wide; spikelets in pairs, bright-green, often tinged with purple, a^out 2.5 mm. long and 1.5 mm. wide, elliptic, acute or acutish, the first scale wanting, the second and third scales 3-nerved, the fruiting scale yellowish-white and only slightly convex in cross-section.
Type locality : Hacienda de La Laguna, near Jalapa, Vera Cruz.
Distribution : Louisiana to Mexico and Guatemala ; Cuba ; also in tropical South America.