Plants epiphytic, autotrophic. Pseudobulbs ovoid, bilaterally flattened, 3-6(-10) × 2.5-4 cm, usually enclosed in leaf bases. Leaves 4 or 5, lorate, 40-90 × 1.5-4(-6) cm, thickly leathery, articulate 8-16 cm from base, apex obtuse and unequally 2-lobed. Inflorescence arising from within sheaths at base of pseudobulb, pendulous, 20-60 cm; rachis (20-)25-35-flowered; floral bracts 2-5 mm. Flowers slightly fragrant, medium-sized; pedicel and ovary 12-20 mm; sepals and petals pale yellow to cream-yellow, with a broad, central maroon-brown stripe; lip white or cream-colored, with dense, maroon venation on lateral lobes and longitudinal maroon stripes on mid-lobe. Sepals spreading, narrowly oblong to narrowly elliptic, 15-20 × 4-6 mm, apex obtuse. Petals narrowly elliptic, 14-18 × 4-6 mm, apex obtuse to acute; lip subovate, 13-20 mm, not fused to basal margins of column, base slightly saccate, 3-lobed; lateral lobes acute, loosely clasping column and exceeding column and anther; mid-lobe recurved; disk minutely papillate or puberulent, with 2 sigmoid lamellae; lamellae usually broken in middle and inflated toward base and apex. Column slightly arcuate, 10-12 mm; pollinia 2. Capsule oblong-ellipsoid, 35-65 × 20-30 mm. Fl. Apr-May, fr. Aug. 2n = 40*.