Plants terrestrial or lithophytic, with a short rhizome. Leaves 4-7, distichous; blade abaxially pale green, often spotted or marked in varying degrees with purple, adaxially tessellated with dark and light green, oblong or elliptic, 7-18(-23) × 2.5-6(-8) cm, leathery, ciliate near base, margin slightly denticulate, apex acute or oblique-acute. Scape initially hooked-recurved and then suberect, terminating in 1 or rarely 2 flowers; peduncle greenish, marked with purple or purple-brown, 25-40(-60) cm, white villous; floral bract greenish, marked with purple, ovate or ovate-lanceolate, conduplicate, 1.5-2.5 cm, abaxially white villous; pedicel and ovary 4-6.5 cm, white villous. Flower slightly scented, 5-10 cm in diam.; dorsal sepal, synsepal, and petals apple-green or very rarely yellowish green, veined or slightly spotted with brownish purple; lip pale yellow-green or rarely whitish green obscurely spotted with brownish purple adaxially; staminode white, apical half blackish purple or slightly veined with purplish. Dorsal sepal ovate to ovate-lanceolate, 3.3-7 × 1-4.5 cm, abaxially white villous, adaxially sparsely white puberulent, ciliate, acuminate at apex; synsepal similar to dorsal sepal, slightly shorter and broader. Petals narrowly oblong to broadly ovate, 3.5-7 × 0.6-5 cm, both surfaces sparsely puberulent, adaxially white villous toward base, ciliate, apex acute-obtuse; lip subglobose to subellipsoid, 1.5-5 × 1-5 cm, outside puberulent, apical margin involute. Staminode suboblong to broadly ovate, 8-14 × 4-15 mm, abaxially carinate, ciliate along basal margin, apex truncate. Fl. Jan-Apr.
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