Rhizome creeping, 6-10 mm in diam., densely covered with membranous sheaths. Pseudobulbs 2-6 cm apart from each other, ovoid-cylindric, 3-9 cm, 1.5-3 cm in diam., with a terminal leaf. Petiole 4-5 cm; leaf blade elliptic or elliptic-oblong, 15-25 × 3-6 cm, leathery, base subrounded, apex obtuse. Scapes 1 or 2, from base of pseudobulbs, erect, 15-18 cm; umbel 5-13-flowered; peduncle with 3-5 tubular sheaths; floral bracts lanceolate or oblong-lanceolate, 7-8 mm. Pedicel and ovary 1.6-1.8 cm. Flowers large, yellowish, median sepal and petals spotted with purple distally, lateral sepals finely spotted with purple proximally; lip yellowish spotted with purple. Dorsal sepal elliptic, concave, 6-6.5 × 5.5-6 mm, apex rounded to emarginate, with a (clavate-tipped) thread 5-7 mm; lateral sepals ovate-triangular, 23-35 × 5-6 mm, base adnate to column foot and twisted above it, their upper edges connate to each other except in basal part. Petals elliptic to ovate, ca. 4 × 2.5 mm, tip caudate with a thread 1-1.5 mm, margins finely erose to deeply lacerate distally; lip recurved, with rounded, patent auricles well above base, ovate-oblong, 3.5-5 × 1.5-3 mm, fleshy, adaxially with 2 rounded ridges, base hardly concave, apex obtuse. Column ca. 3 mm; foot ca. 3 mm, with free part ca. 1.5 mm; stelidia porrect or slightly curved downward, triangular, acute, with a small tooth along upper margin, ca. 1.5 mm; anther cap toothed at apex. Fl. Mar.
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