Annual; culms 10-30 cm., or sometimes as much as 50 cm., high, very slender, erect or ascending, sometimes geniculate-spreading, branching at the lower nodes, glabrous; sheaths keeled, glabrous or usually pilose, the margins rather densely ciliate, the lower ones crowded, usually longer than the internodes, the upper elongate; blades 2.5-15 cm. long, 4-10 mm. wide, thin, glabrous, the margins more or less ciliate toward the rounded or subcordate base; inflorescences long-exserted on slender peduncles, terminal and axillary from the upper sheath; racemes mostly 2 or 3, sometimes 4 or 5, slender, ascending or spreading, the 2 upper ones conjugate, the others a short distance below, the rachis about 0.5 mm. wide, flexuous, the margins scabrous; spikelets about 1.3 mm. long, obscurely pointed, glabrous or sparingly pubescent.
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