Herbs, perennial, cespitose, to (3--)7--9 dm. Cataphylls 1--2. Leaves basal, 2--3(--5); auricles transparent, 2--3.5 mm at summit of leaf sheath, apex acutish, membranous; blade flat, (10--)20--30 cm x 0.5--2.3 mm, margins entire. Inflorescences 10--100-flowered, diffuse; internodes of monochasia greater than 6 mm, primary bract usually exceeding inflorescence. Flowers: pedicels 0.1--0.3(--3) mm; bracteoles 2; tepals green, lanceolate, 3.2--4.5 x 0.7--1 mm; outer and inner series nearly equal, in fruit apically erect; stamens 6, filaments 0.8--1.1 mm, anthers 0.3--0.7 mm; style 0.2 mm. Capsules tan, 1-locular, widely ellipsoid to obovoid, 2--3.2 x 1.1--1.6 mm. Seeds tan, ellipsoid, 0.33--0.556 mm, not tailed. 2n = 80.
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