Description from Flora of China
Hetaeria fusca Lindley, Gen. Sp. Orchid. Pl. 491. 1840 ["Aetheria"]; Cystorchis fusca (Lindley) Bentham & J. D. Hooker; Epipactis fusca (Lindley) A. A. Eaton; Orchiodes fusca (Lindley) Kuntze.
Plants terrestrial, 10-22 cm tall. Rhizome short, few noded. Stem erect, 1-3 cm, 5-8-leaved. Leaves rosulate at base of stem, green, without white markings, ovate or ovate-elliptic, 1.5-3.5 × 0.8-2 cm, apex obtuse or acute; petiole-like base and tubular sheath 0.8-1.8 cm. Peduncle pale green, 4.5-9 cm, sparsely pubescent, with 1-3 sterile bracts; rachis 3-9 cm, densely many flowered, secund or not; floral bracts ovate-lanceolate or lanceolate, 6-10 mm, basal ones exceeding flowers, pubescent, apex acuminate. Flowers opening weakly, white flushed with pale green, small; pedicel and ovary cylindric-fusiform, 6-7 mm, densely pubescent. Sepals pubescent on outer surface, 1-veined; dorsal sepal oblong, 4-7 × 1.5-2 mm, concave, apex obtuse; lateral sepals oblong, oblique, 4-7 × 1.8-2.2 mm, apex subacute. Petals linear-oblong, falcate, 4-7 × 1.5-2 mm, 1-veined, apex obtuse; lip broadly ovate, 3-5 × 2-2.5 mm; hypochile conspicuous and projecting beyond base of lateral sepals, concave-saccate, glabrous, with 2 ridges running parallel to midvein inside; epichile abruptly narrowed, narrowly oblong, apex obtuse, recurved. Column ca. 1.5 mm. Fl. Aug-Sep. 2n = 32, 32 + 2B.
Forests, thickets, alpine meadows; 2600-4500 m. S and SE Xizang, NW Yunnan [Bhutan, NE India, N Myanmar, Nepal].