Plants ascending. Stems short to slightly elongate. Leaves often 4 or 5; blade terete, 30-60 cm × 3-4 mm, fleshy, adaxially channeled, apex acuminate. Inflorescence nodding, 10-28 cm, laxly many flowered; floral bracts broadly ovate, ca. 5 mm, obtuse. Flowers large, opening widely, thinly textured, sepals and petals white, sometimes tinged with pale purple, lip purple or white heavily striped with purple, lateral lobes brownish, spur and column white; pedicel and ovary 3-3.5 cm. Dorsal sepal elliptic, ca. 23 × 8 mm, base contracted into a short claw, apex obtuse; lateral sepals obliquely ovate-falcate, ca. 27 × 10 mm, obtuse. Petals similar to dorsal sepal; lip spurred, 3-lobed; lateral lobes erect, somewhat ovate-lanceolate, oblique, abruptly contracted near middle, apical half linear-lanceolate and curved; mid-lobe suborbicular, ca. 1.6 cm, adaxially with 2 or 3 basal lamellae, margin ± erose, apex retuse; spur ± arcuate, cylindric, ca. 1.5 cm, attenuate toward tip. Column ca. 7 mm; anther cap narrowed at apex. Fl. Oct-Nov. 2n = 38.
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