Stoloniferous perennial ,1.5-2 m or more tall; culms hollow, decumbent at the base; nodes with a narrow band of short sericeous trichomes. Sheaths mostly longer than the internodes, glabrous or sparsely hispid at the throat; ligules 2-3 mm long, the upper margin irregular and fringed; larger blades (mid-culm) to 1 m long and 6 cm wide, the margins scabrous. Panicles terminal, 30-60 cm long, to 40 cm wide; axis +/- ribbed, the ribs scabrid; branches stiffly ascending, naked at base; spikelets oblong-elliptic, narrowly acute at apex, ca 2.5 mm long, glabrous; first glume to three-fourths the length of the spikelet; second glume as long as the spikelet, ribbed. Fruits 1.3-1.8 mm long, pale, smooth, shiny. Croat 12700. Occasional, along the shore, often forming huge stands during the rainy season on silt deposits in Fuertes Cove. Seasonal behavior uncertain. Probably flowering and fruiting in the rainy season. Distinguished from other Panicum by its large leaves. Nicaragua to Venezuela; Trinidad. In Panama, known from tropical moist forest in the Canal Zone, Colón, Panama, and Darien. See Figs. 47 and 48.