T: China, [Gansu] Terra Tangutorum (prov. Kansu), regio alpina secus fl. Tetung (affl. Hoangho), Jul 1872, N.M.Przewalski s.n.; syn: W, S.
Perennials, 3–28 cm tall, densely caespitose; rhizome short, densely branched. Stem erect, terete, 0.2–0.5 mm thick. Cataphylls 1–3, pale castaneous, to c. 3 cm long; basal and sub-basal leaves 1–3, unitubular, indistinctly septate, 2–11 cm long, 0.6–1.0 mm in diam. Cauline leaf 1, inserted in upper 1/2–1/4 of stem; blade reduced, 0.5–2 cm long, thin; sheaths tight, c. 1.5–2.5 cm long, with dark castaneous margins, sometimes entirely castaneous; auricles obtuse to truncate, 0.5–1.3 mm long, dark castaneous or distally scarious. Bracts ovate, ±acute, (4–) 6–8 (–10) mm long, deep castaneous-brown, usually with paler to scarious margins and distal part, ±equalling inflorescence. Inflorescence a single terminal hemispherical (3–) 5–7 (–10)-flowered head 7–17 mm wide. Pedicels 0.5–1 mm long. Tepals ovate-lanceolate, subacute, 4.5–6.5 mm long, 1–1.5 mm wide, usually dark purplish-castaneous; margins paler to scarious, of variable width, or rarely tepals entirely ivory-white. Stamens 6, long exserted, 5–8 mm long; anthers linear-elliptic, white, 1.3–2.6 mm long; filaments 3.7–4.4 (–7) mm long; style 1.5–2.5 mm long; stigmas 0.5–0.8 mm long; ovary 2–3 mm long, 0.8–1.1 mm wide, brown or yellowish white. Capsule unilocular, rostrate, narrowly obovoid-trigonous, acuminate, c. 4.5–6.0 mm long including rostrum, 1.5–2 mm wide, castaneous-brown, shining; rostrum 1.0–1.5 mm long, exceeding perianth. Seeds ellipsoid, 0.5–0.8 × 0.25–0.3 mm, brown, or c. 2.0–2.5 mm long including two subequal appendages 0.3–0.6 mm long. Fig. 69.