Panicum pyrularium Hitchc. & Chase

Panicum pyrularium Hitchc. & Chase, Contr. U. S. Nat. Herb
17: 508. 1915.
Plants annual; culms delicate, 10-13 cm. high, at first erect and simple, finally decumbent and branching, often rooting at the nodes, more or less zigzag, sometimes elongating to 25 or 30 cm.; nodes sparsely pilose or glabrous; leaf -sheaths shorter than the blades, glabrous or sparsely pilose; ligule membranaceous, about 0.5 mm. long; blades thin, flat, spreading, 1-3 cm. long, 2-7 mm. wide (the lower sometimes smaller), narrowly elliptic, somewhat clasping at base, obtuse or acutish at the apex, scabrous on the margins, glabrous or sparsely pilose on both surfaces, sometimes glaucous; panicles terminating the culm and branches, loose and open, 2-5 cm. long, about as wide, oval or pyramidal in outline, the delicate flexuous branches and branchlets spreading or reflexed, smooth, the capillary divaricate pedicels several times longer than the spikelets; spikelets 1.5 mm. long, 0.6 mm. wide, turgid, pyriform, long-attenuate at base, glabrous; first glume about half as long as the spikelet, acute; second glume and sterile lemma 5-nerved, not exceeding the fruit, the glume slightly shorter than the sterile lemma; fruit 1 mm. long, 0.5 mm. wide, turgid.
Type locality: Province of Chiriquf, Panama. Distribution: Panama to Venezuela.