Plants autotrophic, 7.5-8.5 cm tall. Stem ascending, green-brown, 1-1.5 mm in diam., 3-5-leaved. Leaves abaxially purple, adaxially deep green, ovate, 0.6-0.8 × 0.4-0.6 cm, apex acute; petiole-like base and tubular sheath 0.3-0.5 cm, base sheathing. Peduncle 3-4 cm, with 2 sheathing sterile bracts, villous; rachis 1.5-3 cm, subdensely (1 or)2-or 3(or 4)-flowered; floral bracts purplish, narrowly ovate, 5-7 × 2.5-3 mm, glabrous with sparsely ciliate margin, apex long acuminate. Flowers resupinate; ovary and pedicel fusiform, 7-8 mm. Sepals white with a reddish purple longitudinal stripe on either side of midvein, 1-veined; dorsal sepal forming a hood with petals, narrowly ovate, 5-6 × 2-2.5 mm, glabrous, apex obtuse; lateral sepals oblong-lanceolate, oblique, 8-9 × 2.8-3 mm, saccate at base. Petals white with a reddish purple longitudinal band along midvein, linear-lanceolate, oblique, 5-6 × ca. 1 mm, margin ciliate, apex acute; lip white, Y-shaped, 12-13 mm, membranous; hypochile concave, globose-saccate, 2-2.5 × 1.5-2 mm, aseptate, containing 2 narrowly oblong calli; mesochile 4.5-5 mm, with a fimbriate flange along each margin, with 3 or 4 reddish purple blotches on either side of midvein; flanges composed of 5-8 narrow, well-spaced filaments, each filament 1-2 mm; epichile dilated, 2-lobed, with a solitary reddish purple blotch in sinus; lobes diverging at an acute angle to one another, obovate, 4-5 × 3.5-4 mm, margin slightly undulate, apex truncate-obtuse. Column ca. 1.5 mm, stout; anther purple-red, narrowly lanceolate, ca. 3.5 mm; rostellum pink, apex forked; stigma lobes separate, subrotund. Fl. Jun-Jul.
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