Herbs, perennial, rhizomatous, 2--9 dm. Rhizomes 2--3 mm diam. Culms erect, 2--5 mm diam. Cataphylls 2, chestnut brown, apex acute. Leaves: basal 2, cauline 1--2, light green; auricles absent; blade 1--15 cm × 2--5 mm. Inflorescences panicles of (2--)10--77 heads, 2--9.5 cm with ascending to erect branches, or heads solitary; primary bract erect; heads 3--35-flowered, spheric to obovoid, 0.5--1.2 mm diam. Flowers: tepals dark brown to purplish brown, lanceolate, 3.3--4.8 mm, nearly equal; outer tepals acuminate, mucro subulate; inner tepals acuminate or cuspidate, mucro subulate; stamens 6, anthers 2--3 times length of filaments. Capsules included, chestnut brown or straw-colored, 1-locular, oblong, 3.8--5.6 mm (including beak), apex acute proximal to beak, beak slightly exserted. Seeds obovoid, 0.5--0.6 mm, not tailed.
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