Sam. in H.R.E.Handel-Mazzetti, Symb. Sin. 7: 1233 (1936)
T: China, Yunnan, Tseku on Mekong, Monbeig 43; syn: S.
Perennials, 6–20 cm tall, densely caespitose; rhizomes short. Cataphylls 1 or more, shortly aristate, tightly encircling stem, pale- to orange-brown; basal leaves 1 (–3). Cauline leaves usually 2, with lower one sub-basal and upper one 2/3 way along stem. Lower leaf blade linear, to 8 cm long, 0.6–1.0 mm wide, cylindric, grooved above, sometimes also beneath, non-septate; apex ±acute. Upper leaf with conspicuous, slightly inflated, often brownish sheath and short bristle-like blade to 0.8 cm long; auricles obtuse, free part c. 0.2 mm long, transparent, membranous, sometimes not visible. Lower 2 bracts subequal, lanceolate, ribbed when dry, scarcely exceeding capitulum, usually pale brown. Inflorescence hemispheric, 5–9-flowered, to 1.2 cm diameter, with flowers shortly pedicellate. Tepals narrowly lanceolate, ±equal, 4.4–5 mm long, ±white. Stamens 6; anthers 1.8–2.5 mm long, at least partly exserted; filaments 4–5.4 mm long; ovary ellipsoid, 2.3–2.8 mm long, abruptly contracted into 2.5–2.7 mm style; stigma capitate, pin-like, with exceedingly short lobes. Capsule broadly ellipsoid-trigonous, stramineous to brown, 2.3–2.8 mm long; mucro 0.9–1.2 mm long. Seeds c. 0.8 mm long; appendages short, c. 0.1–0.3 mm long.