Stems very short, stout. Leaves 3 or 4, green, often suffused red abaxially, elliptic, oblong, or falcate-oblong, 8-22 × 3-7 cm, base cuneate or sometimes oblique, apex acute or obtuse. Inflorescence to 50 cm, unbranched or sometimes branched, many flowered; rachis purplish green, ± flexuous; floral bracts ovate-triangular, 3-5 mm. Flowers mainly white, 5-6 cm in diam., lateral lobes of lip with red spots or lines, callus yellow, spotted green; pedicel and ovary green, slender, 2.5-4.5 cm. Dorsal sepal ovate-elliptic or subelliptic, 2.5-4 × 1.5-2.5 cm, base slightly contracted, apex obtuse; lateral sepals obliquely ovate, 2.5-3.5 × 1.4-2.2 cm, acute. Petals rhombic-obovate, 2.7-3.4 × 2.4-3.8 cm, base narrowed into a short claw, apex rounded; lip 3-lobed, base with a linear claw 7-9 mm; lateral lobes erect, falcate-obovate, ca. 2 cm, base contracted, apex rounded or acute; mid-lobe subrhombic, 2.8-3.5 × 1.4-1.7 cm, base cuneate, with 2 slender apical tails (cirri) 8-18 mm; disk with a forked callus between lateral lobes. Column ca. 1 cm, stout, foot broad; stipe ca. 4.5 mm. Fl. Apr-Jun. 2n = 38.
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