(Engelm.) Coville, Contr. U. S. Natl. Herb. 4: 207 (1893)
Perennials, c. 20–45 cm tall, loosely caespitose; rhizome horizontal, creeping, to c. 2 mm diam., with internodes 0.5–5 cm long; stolons present. Stem erect, slightly compressed, ±papillose. Cataphylls 1–3, brownish, usually 1.5–4 cm long. Basal and sub-basal leaves several, c. 5–25 (–30) cm long, (1–) 3–5 (–6) mm wide, flat; cauline leaves 1–3, shorter and narrower; margins papillose-serrulate; apex subulate; sheaths with narrow scarious or membranous margins; auricles absent or up to 0.5–0.8 mm long, subacute, scarious. Lower bract leaf-like or reduced, brownish, 1–4 cm long, much shorter than inflorescence. Inflorescence usually 3–10 cm long, decompound, of (2–) 3–8 (–12) cup-shaped to hemispherical, (4–) 5–8 (–10)-flowered heads on peduncles usually 2–8.5 cm long. Capitulum bracts pale castaneous, to 6 mm long. Tepals subequal, deep castaneous to ±brown; outer tepals often slightly shorter, lanceolate, acute; inner tepals subobtuse, mucronate, 5–6 mm long, with central band green becoming pale brown, narrow, slightly papillose; margins brownish and narrowly membranous. Stamens 6; anthers 1.6–2.8 mm long; filaments 0.4–0.6 (–0.8) mm long; style (including young mucro) 1.3–1.9 mm long; stigmas to 3.5 mm long. Capsule trilocular, elongated-ovoid, ±truncate, c. 3.5–4.5 mm long including 0.4 mm mucro, pale castaneous, shorter than perianth. Seeds narrowly ovoid, c. 0.5–0.6 × 0.25 mm, apiculate, brown, distinctly reticulate; appendages absent. 2n = 40, fide R.E.Brooks & C.E.Clemants, Fl. N. Amer. 22: 226 (2000). Fig. 56.