Description from Flora of China
Plants 28-33 cm tall. Rootstock creeping, cylindric, stoloniferous. Stem erect or ascending, with 2 tubular sheaths at base, 2-leaved. Leaves cauline, widely spaced, narrowly oblong, narrowly lanceolate, or spatulate, 12-17 × 1.5-3 cm, base attenuate and clasping, apex obtuse or acute. Peduncle slender, with 2 or 3 foliaceous bracts; rachis cylindric, 8-10 cm, subdensely many flowered; floral bracts lanceolate, margin ciliate, apex acuminate, basal ones exceeding flowers. Flowers fragrant, yellowish green; pedicel and ovary slightly arcuate, fusiform, 6-7 mm, glabrous. Dorsal sepal erect and connivent with petals, ovate, cymbiform, ca. 4 × 2.2 mm, 1-veined, margin ciliate, apex obtuse; lateral sepals spreading, ovate, slightly oblique, ca. 4 × 2 mm, 1-veined, margin ciliate, apex obtuse. Petals ovate, oblique, ca. 3.5 × 2 mm, 1-veined, apex slightly obtuse; lip straight, ligulate-ovate, ca. 3.5 × 1.6 mm, entire, apex obtuse; spur pendulous, cylindric, 10-12 mm, exceeding ovary, slender, apex obtuse. Column ca. 1.5 mm, stout; staminodes small; anther locules nearly parallel; pollinia obovoid, with short caudicles and narrowly lanceolate viscidia; rostellum erect, short; stigma lobes separate, raised, clavate, protruding, apex obtuse. Fl. Jul.
● Bamboo forests on slopes; ca. 2800 m. SC Sichuan (Emei Shan).