Stout, stoloniferous perennial; culms mostly 1-2 m. high, erect, glabrous, or the nodes sometimes pubescent; sheaths mostly longer than the internodes, com-pressed, glabrous or sometimes pilose on the collar and margins; blades 20-60 cm. long, mostly 1-3 cm. wide, flat, glabrous, or rarely pubescent; inflorescence as much as 40 cm. long, composed of few to many ascending racemes 8-16 cm. long; spikelets 3 mm. long, glabrous or sparsely pilose, usually purple-tinged, the second glume and sterile lemma rather strongly nerved.
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