T: USA, Arkansas, Hot Springs, 9 Jul 1896, H.Eggert; holo: NY.
Perennials, 30–90 cm tall, caespitose. Rhizomes short, densely branching. Cataphylls 1–3, c. 3.5–5 cm long, tight, castaneous, shiny; blades sometimes reduced. Basal leaves 0–1 (–2), nearly terete but slightly channelled ventrally, 10–50 cm long, 0.7–1.8 mm wide; auricles 0.2–0.4 (–0.6) mm long, scarious to leathery. Lower bract 5–45 cm long, much exceeding inflorescence, erect; other bracts castaneous, narrowly ovate. Inflorescence a 5–35-flowered loose lax cyme 1–8 cm long. Bracteoles broadly ovate, membranous, 1.2–1.7 mm long. Tepals subequal; outer tepals slightly longer, lanceolate to broadly lanceolate, with dark green central band, paler towards margins, acute to acuminate, 3.5–5.0 mm long; inner tepals 2.5–4.5 mm long. Stamens 6, fewer in cleistogamous flowers, not exserted; anthers 0.5–1.1 mm long; filaments 0.8–1.2 mm long; style 0.9–1.3 mm long; stigmas pinkish, 2.0–2.5 mm long. Capsules unilocular, broadly ovoid to subglobose, subobtuse with a short mucro, 3.5–5.0 mm long, 2.6–3.2 mm wide, light to dark brown, ±equalling perianth. Seeds 0.55–0.73 × c. 0.3–0.5 mm; inner seed coat ±reticulate; appendages absent. 2n = 80, fide R.E.Brooks & S.E.Clemants, Fl. North Amer. 22: 2230 (2000).