Description from Flora of China
Plants to 50 cm tall. Tubers oblong, 4-5 × 2-2.5 cm, fleshy. Stem erect, terete, slender, glabrous, with 6 leaves below middle and 11 sparse bractlike leaves above. Leaf blade elliptic to narrowly elliptic, 8-18 × 3-6.5 cm, base contracted into amplexicaul sheath, apex acuminate or acute. Raceme densely many flowered, 9.5-13 cm, glabrous; floral bracts lanceolate, 7-15 mm, slightly shorter than or nearly as long as ovary, apex long acuminate. Flowers greenish, small, glabrous. Dorsal sepal forming a concave hood with petals, ovate, ca. 4 × 3 mm, 3-veined, apex acute; lateral sepals reflexed, obliquely oblong-lanceolate, ca. 4.5 × 2 mm, 3-veined, apex subobtuse. Petals lanceolate, concave, ca. 4 × 1.7 mm, with 1 vein, attenuate toward apex, apex subobtuse; lip 3-lobed from base; lobes linear; lateral lobes slightly curved, ca. 7 mm; mid-lobe erect, ca. 5 mm; spur pendulous, curved, ca. 17 mm, much longer than ovary, slender; stigmas suboblong, small. Fl. Sep. 2n = 42.
Forest margins, forests; 1100-1200 m. S Yunnan [Bhutan, India, Myanmar, Nepal, Thailand].