Panicum haenkeanum J. Presl

Panicum haenkeanum J. Presl, in Presl, Rel. Haenk. 1: 304
1830.
Panicum coslaricense Hack. Oesterr. Bot. Zeits. 51: 428. 1901.
Plants perennial, straggling, with culms as much as 2 meters long often rooting at the nodes; culms slender, erect, 0.5-1 meter high, sparingly branched, striate, glabrous or minutely pubescent ; leaf -sheaths much shorter than the elongate internodes, papillose-pilose to glabrate, ciliate at least toward the summit; ligule membranaceous, ciliate, about 0.5 mm. long; blades 5-10 cm. long, 6-12 mm. wide, narrowed toward the base, long-acuminate, very sparsely pilose on both surfaces or glabrate; panicles ovoid in outline, 10-15 cm. long, about two thirds as wide, loosely flowered, the slender, flexuous branches ascending or spreading, bearing delicate branchlets throughout, the scattered spikelets on capillary, flexuous pedicels; spikelets 2.4 mm. long, 0.7 mm. wide, elliptic, acute, rather strongly nerved; first glume nearly half the length of the spikelet, acute, hirsute toward the margin; second glume and sterile lemma sub-equal, pointed beyond the fruit, hirsute toward the margin and with very minute papillae bordering the nerves; fruit 1.7 mm. long, 0.6 mm. wide, elliptic, smooth and shining, the margins of the lemma near the base each bowed out into a little angle, giving a somewhat auricled appearance
Typ3 locality: Mexico. Distribution : Mexico to Panama.