T: USA, Illinois, Richview, G.Vasey s.n.; holo: GH29651.
Perennials, c. 20–60 cm tall, densely caespitose; rhizome short, densely branched. Cataphylls 1–3; leaves basal, 1–2 (–3) per stem, 5–15 cm long, flat with margins turned up, 0.5–1.1 mm wide; sheaths pale green to reddish; auricles whitish or purplish tinged, scarious, 0.2–0.4 (–0.6) mm long. Lower bract 1–10 cm long, usually shorter than inflorescence. Inflorescence c. 1.5–7 cm long, (5–) 10–30 (–50)-flowered, of anthelate appearance, or unilateral cymes distinct; flowers borne singly; pedicels 0.3–1.0 mm long. Bracteoles broadly ovate, membranous, 1.2–1.7 mm long, subacute or subobtuse. Tepals subequal (outer ones often slightly longer), 3.0–3.8 (–4.4) mm long, lanceolate, acute to acuminate; central band ±green becoming stramineous-brown, narrow; margins distinct, membranous. Stamens 6, not exserted; anthers 0.4–0.6 mm long; filaments 0.5–0.9 mm long; style 0.1–0.2 mm long; stigmas c. 1.5–2.0 mm long. Capsule unilocular, broadly ellipsoid to subglobose, obtuse to truncate, (3.3–) 3.8–4.7 mm long, subequalling or ±exceeding perianth, tan or darker. Seeds ellipsoid to lunate, c. 0.4–0.6 × c. 0.15–0.25 mm; appendages indistinct. 2n = 80, fide N.A.Harriman & D.Redmond, Rhodora 78: 730 (1976).