Bulletin of the Torrey Botanical Club 27: 516. 1900.
Herbs, perennial, tufted, 2–6 dm. Rhizomes densely branching. Culms 1–10. Cataphylls 1–3. Leaves basal, 1–2(–3); auricles whitish or purplish tinged, 0.2–0.4(–0.6) mm, scarious; blade flat, 5–15 cm × 0.5–1.1 mm, margins entire. Inflorescences usually somewhat compact, 1.5–7 cm; primary bract usually shorter than inflorescence. Flowers: bracteoles 2; tepals greenish, lanceolate, 3.3–4.4 mm, apex acuminate; stamens 6, filaments 0.5–0.9 mm, anthers 0.4–0.6 mm; style 0.1–0.2 mm. Capsules light tan or darker, 1-locular to pseudo-3-locular, ellipsoid to nearly globose, (3.3–)3.8–4.7 mm, nearly equal to or longer than tepals. Seeds tan, ellipsoid to lunate, 0.436–0.73 mm, not tailed. 2n = 80.
Phenology: Flowering and fruiting late spring–early summer.
Habitat: Dry, often upland sites in prairies, exposed disturbed sites, and ditches in sandy or clayey soils
Alta., Man., Ont., Que., Sask., Ariz., Ark., Colo., Ill., Ind., Iowa, Kans., Ky., La., Minn., Mont., Mo., Nebr., N.Mex., N.Dak., Ohio, Okla., S.Dak., Tenn., Tex.as, Utah, Wis., Wyo.