Plants epiphytic or rarely epilithic; stems to 40 x 10 mm; leaves ligulate-oblong, thick-tissued, somewhat narrowed to the base, unequally bilobed, lobes rounded to acute, margins undulate, 50-200 x 20-50 mm. Inflorescences of several c. 200 mm long, 4-12-flowered racemes; peduncle with several tubular sheaths; bracts broadly ovate, apiculate, to 8 mm long. Flowers white, to 30 mm in diameter; pedicel plus ovary to 30 mm long. Sepals unequal; median erect, arching over the gynostemium, narrowly elliptic, apiculate, 11-20 x 4-8 mm; laterals deflexed, twisted to face backwards, linear-elliptic, acute, 16-21 x 3-5 mm. Petals reflexed, narrowly oblanceolate, acute, 14-20 x 6-8 mm. Lip deflexed, narrowly oblong, apically conduplicate, basally the margins decurved, 16-18 x 6-9 mm; spur pendent, thickened in the apical half, 120-160 mm long, entrance with 2-4 longitudinal ridges. Gynostemium erect, 6 mm tall.
Home