Perennials, compact, cushion-forming. Stems erect, much branched, distal part with leaves 8–10 cm. Leaves rigid and conical; blade 20–30 mm long, to 1.2 mm wide; auricles membranous, rounded, sometimes forming a ligule-like adaxial structure. Bracteoles scarious, unequal, 3.0–4.5 mm long. Flowers unisexual; pedicels 1–3 cm long, ±equal in both sexes. Staminate flowers with tepals narrowly lanceolate, scarious, stramineous, rarely castaneous; outer tepals 6.5–7.5 mm long; inner tepals 7.5–8.0 mm long; stamens 6; anthers 4–5 mm long, mucronate; filaments 0.3–0.5 mm long; pistil rudimentary. Pistillate flowers slightly smaller; tepals broadly lanceolate, 6–8 mm long; ovary ellipsoid, 2 mm long; style c. 2 mm long, stigmas filiform, elongated, c. 2–4 mm long, exserted. Capsule ovoid, with rigid, shining wall, 8–11 mm long, 4.0–4.5 mm wide. Seeds 1.0–1.3 mm long, 0.8–1.0 mm wide. 2n=16 (Sasaki, 1937, n.v., fide H.Balslev, Fl. Neotrop. Monogr. 68: 32 (1996) 1996: 32; an old, doubtful count).