T: China, Setchuen [Sichuan], Nanch'uan, Shihtru K'on, Chinfu shan, 7 Jul 1891, C.Bock & A. von Rosthorn 78; holo: O.
Perennials, (20–) 40–80 cm tall, forming dense often tussock-like stands; rhizome horizontal, very short-noded, densely branched, 1.5–3 mm diam. Stem leafless, straight or ±curved, terete, 1–1.5 mm diam., greyish green; ridges 15–30, c. 10–15 prominent, others distinct in dry condition; subepidermal sclerenchyma strands mostly small, sometimes some connected to vascular bundles; epidermis cells on the ridges enlarged; bundles in two rows; pith continuous, usually dense, of irregularly astericiform cells, becoming arachnoid. Cataphylls 3–5; upper cataphylls 4–9 (–12) cm long, loose, with up to 3 mm long awn-like blade, abaxially greenish to stramineous above, dull, dark reddish-brown and glossy below, adaxially silvery stramineous. Lower bract 5–15 (–20) cm long, straight or curved, considerably exceeding the inflorescence. Inflorescence pseudolateral, 1–5 cm long, dense to lax; flowers (4–) 15–50, solitary, on abbreviated or elongated peduncles. Bracteoles 0.8–1.2 mm long, broadly ovate, acute, scarious to stramineous. Tepals ovate-lanceolate, subequal, acuminate to acute; outer tepals 2–3 × 0.9 mm, equalling to slightly longer than c. 2.2–2.5 mm inner tepals; central band prominent, broad, stramineous to greenish, bordered pale castaneous; margins broad, membranous. Stamens 3, slightly shorter than tepals; anthers c. 0.4–0.7 mm long, shorter than c. 0.7–0.9 mm filaments; style c. 0.1 mm long; stigmas reddish, c. 0.5–0.8 mm long. Capsule triseptate, septa not reaching halfway to capsule centre, obovoid to broadly so, 2.5–3 mm long, exceeding perianth, obtuse, greenish to light brown, shining, unilocular, triseptate. Seeds obliquely ovoid to subglobose, 0.5–0.6 × 0.2–0.3 mm, apiculate, indistinctly striate, faintly irregularly reticulate, pale brown; appendages absent.