Herbs, perennial, rhizomatous, 7--10 dm. Rhizomes 3--7 mm diam., nodes not swollen. Culms erect, terete, 2--4 mm diam. Cataphylls 2--3, straw-colored, apex rounded. Leaves: basal 0, cauline 1; auricles 0.5--1.5 mm, apex blunt, cartilaginous; blade 25--35 cm × 1--2 mm. Inflorescences terminal panicles of 24--60 heads, 5--10 cm, branches spreading; primary bract erect; heads 15--50-flowered, spheric, 4.5--6 mm diam. Flowers: tepals light brown, lanceolate to oblong, 2--2.5 mm, nearly equal; stamens 6, anthers longer than filament. Capsules included with beak slightly exserted, chestnut brown, 3-locular, ovoid, 2.5 mm, apex acute proximal to beak, valves separating at dehiscence, fertile throughout or only proximal to middle. Seeds not seen.
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