Herbs 5--70 cm tall. Petiole margin wide, green; leaf blade oblanceolate, lanceolate, or obovate, (3--)5--14(--16) X (0.6--)1--3.5(--5) cm, thin, base attenuate, apex acuminate. Inflorescences capitate or conical, main rachis stout, sometimes with thick crisped wings; branches 1--5, thick, short; spikes with (3--)7--11(--13) spikelets; spikelets 3--5-flowered; bracts ovate-oblong, 8--9 mm, apex cuspidate; first bractlet similar to bract but apex 1--3-cuspidate. Calyx 7--8 mm, tube 1.2--1.5 mm in diam., lobes irregularly dentate, veins purple and reaching to or extending beyond middle of limb. Corolla light purple. Fl. Jun-Aug, fr. Jul-Sep.
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