S.C.Chen & Z.H.Tsi, Acta Phytotax. Sin. 22: 119 (1984)
A terrestrial herb with an elongate more or less creeping rhizome 2–3.5 mm in diameter. Leaves coriaceous, suberect, 7–8, oblong or narrowly elliptic, acute at asymmetric apex, 10–20 m long, 2.5–4 cm wide, dark green above, purple-marked and keeled on lower surface; petiole 2–6 cm long, ciliate. Inflorescence 26–30 cm long, 1-flowered; peduncle purple-brown, hairy; bract narrowly ovate-lanceolate, c. 1.5 cm long, ciliate on margins, pilose on outer surface. Flower 8–12.2 cm across; sepals and petals apple-green, striped and spotted garnet-purple; lip pale greyish, spotted with garnetpurple on inner surface; staminode pure white in basal half, deep maroon in apical half; pedicel and ovary c. 4 cm long, hairy, rostrate at apex. Dorsal sepal elliptic-lanceolate, cuspidate-acuminate, 4.4–7.1 cm long, 1.8–4.5 cm wide, 5-nerved, sparsely pubescent on inner surface, villose without, ciliolate. Synsepalovate-lanceolate, bidentate at apex, dorsally bicarinate, 7-nerved, 3.8–5.3 cm long, 2.4–4.8 cm wide. Petals obovate, subacute, 4–7.1 cm long, 3.4–5.1 cm wide, villose at base, ciliolate, 9-veined, pubescent on inner surface. Lip horizontal, deeply saccate, 4.5–6.5 cm long, 3.8–5.4 cm wide, subglobose, inrolled margins erose, villose at base within, finely pubescent outside. Staminode convex, broadly ovate-oblong, 13–14 mm long, 11–13 mm wide, truncate at apex, subsessile at base, ciliolate and pubescent in basal half, dorsally carinate, rounded bosses on surface in apical half.