Culms triangular, leafy, slender, 5-10 dm. high; leaves 4-9 mm. wide, elongate, thickened, the margins tending to be revolute; inflorescence a corymb, the primary rays 5-9 cm. long, almost filiform; spikelets in clusters of 2-6 at the ends of primary rays and of filiform secondary rays (2-4 cm. long); spikelets dull brown, ovate-oblong, 5-7 mm. long; achene ellipsoid-obovate, 3 mm. long, compressed, dark brown, impressed-punctulate to rugose, the subulate pale yellow beak dilated at the base and exceeding the achene; bristles upwardly scabrous, exceeding the achene.
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