Culms relatively slender, as much as 3 m. long, erect or usually reclining, rooting at the nodes, with no strong central cane, the ascending branches often 1-2 m. long, glabrous; sheaths glabrous on the back, densely villous on the mar-gins; ligule conspicuous, 2-5 mm. long, brown; blades narrowly lanceolate, acuminate, 14-22 cm. long, 7-20 mm. wide, glabrous, the margins scabrous; panicles 10-25 cm. long, the branches ascending to spreading, glabrous in the axils, usually naked in the lower half, the branchlets narrowly ascending, not implicate, bearing a few spikelets at the ends; spikelets 4 mm. long, roughly globose, usually appressed.
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