Description from Flora of China
Habenaria bonatiana Schlechter; H. latilabris (Lindley) J. D. Hooker; Habenella latilabris (Lindley) Szlachetko & Kras-Lapinska; Pecteilis latilabris (Lindley) Mitra; Platanthera acuminata Lindley; Platantheroides latilabris (Lindley) Szlachetko.
Plants 18-55 cm tall. Rootstock tuberous, ellipsoid or ovoid, 1-2.5 cm. Stem stout, with 2 or 3 tubular sheaths at base, (2 or)3-6-leaved. Leaves cauline, widely spaced, ovate to oblong, 5-13 × 2-5 cm, base clasping, apex acuminate. Peduncle elongate, with 1-4 foliaceous bracts; rachis cylindric, 7-30 cm, laxly several to 40-flowered; floral bracts lanceolate or ovate-lanceolate, apex acuminate. Flowers yellowish green; ovary and pedicel cylindric-fusiform, 10-16 mm. Dorsal sepal erect and connivent with petals, broadly ovate to orbicular, cymbiform, 5-7 × 3-4.5 mm, 3-veined, pubescent, margin ciliate, apex obtuse-rounded; lateral sepals reflexed or spreading, ovate, slightly oblique, 5.5-8 × ca. 3.5 mm, 3-veined, pubescent, margin ciliate, apex obtuse. Petals oblong, slightly oblique, 4-7 × (2.5-)4-5 mm, fleshy, 1- or rarely 2-veined, apex obtuse to subacute; lip linear-lanceolate to oblong, 5.5-13 × ca. 1 mm, entire, apex obtuse; disk with a conic callus in front of mouth of spur; spur spreading horizontally to slightly pendulous, cylindric, 8-18 mm, usually longer than ovary, slender, apex obtuse to slightly acuminate. Column erect, short; staminodes subsquare, small; anther locules nearly parallel; pollinia obovoid, with very short caudicles and small, orbicular viscidia; rostellum erect, short; stigma lobes separate, raised, oblong to narrowly oblong, parallel, spreading on either side of base of lip. Capsule fusiform, shortly beaked. Fl. Jul-Aug.
Forests, scrub, grasslands; 1600-3500 m. SW Sichuan, S and SE Xizang, NE and NW Yunnan [Bhutan, NE India, Kashmir, Nepal].