Leaves 3 5, narrowly elliptic, I 0-25 cm long, 3-5 cm wide, adaxially tessellated with darlc and light green, abaxially pale green and sometimes purple-marked basally. 

Scape 20-40 cm long, purple, pubescent; bracts subovate, 1.5-2.8 cm long, green; pedicel and ovary 3-6.5 cm long, green to pale purple, pubescent; flowers业ingle or rarely 2, 8-11 cm across; dorsal sepal and synsepal white, flushed with purple, veined with green and purple; petals yellow-green, with darker veins, flushed with pale rose-purple in apical one third, with a few black warts on the margin of the upper side; lip deep maroon to bronze-brown; staminode pale yellow­green, veined with deep green or purple; dorsal sepal transversely elliptic to broad.ly ovate, 3.4-5.5 cm long, 3-7 cm wide; synsepal much smaller than dorsal sepal; petals narrowly oblong, 4-6.8 cm long, 1.2-1.6 cm wide, maroon-ciliate; lip helmet-shaped, warted on its incurved side-lobes; pouch subovoid, 2.5-3.5 cm long, 2-2.5 cm wide, slightly auriculate on both sides of its mouth; staminode nearly horseshoe-shaped, 10-11 mm long, 7-8 mm wide. 2n=32.

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