Perennials (20–) 40–80 (–100) cm tall, loosely caespitose, subglabrous; rhizome creeping or ascending, branched; stolons usually present, short or to c. 10 cm long. Leaves with densely papillose-serrulate margins; apex acute; basal leaves few; cauline leaves 3–6 (upper 2 or 3 represent leaf-like bracts). Inflorescence usually lax, usually constituting 1/3–1/2 of plant height, decompound, storied; partial inflorescences subtended by leaf-like bracts; branches diverging at wide angles; flowers borne singly, rarely in 2 (–3)-flowered clusters. Tepals equal, glabrous, ±lanceolate, usually 1.8–2.8 mm long, pale reddish brown to dark castaneous-brown. Stamens 6; anthers 0.5–1.1 mm long; filaments 0.6–1.0 mm long; style usually 0.4–0.5 mm long; stigmas 1.0–1.5 mm long. Capsule obovoid to ±ellipsoid, subacute to acute, with mucro 0.2–0.4 mm long, distinctly papillose above when ripe, equalling or ±longer than perianth; capsule segments c. 2.1–2.3 × 1.1–1.4 mm. Seeds deep brown, 1.2–1.4 mm long, (0.6–) 0.7–0.8 mm wide; apex usually distinct; basal appendage indistinct, to 0.1 mm, fibrillate.