T: USA, Colorado, North Park, 6 Sept 1890, C.S.Crandall; holo: US.
Perennials, (20–) 30–50 cm tall, caespitose; rhizomes densely branched, ±short, ascending; stem usually 0.5–0.8 mm in diam. Cataphylls 1–3, stramineous-brown; leaves basal, 2–4 per stem, ±flat, 3–15 cm long, 0.5–1.1 mm wide; auricles usually rounded, 0.3–0.7 mm long, scarious to membranous. Lower bract leaf-like, ±filiform, erect, c. 1.5–6 cm long, longer than inflorescence. Inflorescence of subdense cymes, 1–2.5 cm long, 3–25-flowered. Bracteoles to 1.5 mm long, ovate-lanceolate, acute, yellowish-membranous. Tepals subequal, 3.5–4.3 mm long, lanceolate to lanceolate-ovate, acute; central band prominent, greenish to pale castaneous, bordered darker brown; margins broad, membranous. Stamens 6, not exserted; anthers 0.3–0.5 mm long; filaments 0.6–0.9 mm long; style 0.1 (–0.2) mm long; stigmas c. 1.0 mm long. Capsules trilocular, ±oblong-ovoid, 2.5–3.5 mm long; apex obtuse to ±retuse, ±equalling perianth, tan or darker. Seeds ovoid-ellipsoid, 0.4–0.5 × c. 0.3 mm, alveolate-reticulate, apiculate; apices with minute appendage to 0.1 mm long or apparently without appendages. 2n = 80, fide R.E.Brooks & S.E.Clemants, Fl. North Amer. 22: 221 (2000).