Leaves up to 60 cm long; petiole c. 30 cm long; lamina lanceolate, up to 30 by 6-7 cm, tapering at base. Floral bract greenish purple, c. 8 cm. Inflorescence few-flowered. Sepals dark purple, reflexed, linear-lanceolate, apiculate, subequal, 6.5-8 cm long, 8-10 mm wide. Lateral petals white, narrow, with dentate apex, 15-20 by c. 2.2 mm. Labellum c. 3 cm long, purplish green striate, basal part narrow, lamina white, suborbicular, emarginate, c. 2 by 2.2 cm, the median vein raised as a sharp fold. Stamens 10 mm long, filament c. 3 mm, enlarged towards the base. Ovary 14-20 cm long including the extension; style 10-15 mm long, stigma 15 mm long, with laciniate lobes, c. 6 mm long. Capsule 2.5-3 cm long with short beak. Seeds c. 7 mm long.
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