Panicum trichanthum Nees

Panicum trichanthum Nees, Agrost. Bras. 210. 1829
? Milium microspermum Lag. Gen. & Sp. Nov. 2. 1816.
Panicum guayaquilense Steud. Syn. Gram. 85. 1854.
Panicum microspermum Fourn.; Hemsl. Biol. Centr. Am. Bot. 3: 492. 1885.
Plants often in large bunches; culms ascending from a decumbent base, as much as 1-2 meters long, rather stout, glabrous ; leaf-sheaths shorter than the internodes, ciliate, and usually with a villous ring at the juncture with the blade, otherwise glabrous or rarely pubescent toward the summit; ligule membranaceous, less than 0.5 mm. long; blades oblong-lanceolate, usually 10-15 cm. long, 10-15 or rarely 25 mm. wide, cordate, rather strongly nerved, glabrous or puberulent, often pilose above the ligule ; panicles 10-30 cm. long, the axis glabrous, the numerous branches and branchlets and the long pedicels capillary, flexuous; spikelets 1.2-1.4 mm. long, 0.6 mm. wide, ob ovate-fusiform, acute; first glume less than one fifth the length of the spikelet; second glume shorter than the sterile lemma, both 3-nerved and under a lens minutely bullate-rugose, often ruptured and breaking off as the fruit matures, as in P. trichoides; fruit 1.2 mm. long, 0.6 mm. wide.
Typjs locality: Mexico.
Distribution: Mexico and the West Indies to Paraguay.