Description from Flora of China
Neottia macrophylla D. Don, Prodr. Fl. Nepal. 27. 1825; Herminium congestum Lindley; Spiranthes macrophylla (D. Don) Sprengel.
Plants 6-22 cm tall. Tubers ovoid or ellipsoid, 6-15 × 5-10 mm. Stem with 2 or 3 tubular sheaths at base, 2- or 3-leaved. Leaves basal, clustered, arising from within basal sheaths, narrowly oblong-elliptic to oblanceolate, 3-10 × 0.6-2 cm, apex subacute to obtuse. Inflorescence 5-19 cm; peduncle cylindric, ebracteate or sometimes with 1 foliaceous sterile bract; rachis 1.5-8 cm, subdensely several to many flowered; floral bracts ovate-lanceolate, 1-3 mm, much shorter than ovary, apex acute to acuminate. Flowers horizontal or nodding, yellowish green; ovary distinctly hooked toward apex, 3-6 mm including pedicel. Dorsal sepal erect, ovate, 0.8-1.5 × 0.8-1 mm, 1-veined, apex obtuse; lateral sepals spreading, oblong-lanceolate, 1.5-2 × 0.5-1 mm, 1-veined, apex acute to acuminate. Petals spreading, ovate-lanceolate, oblique, 1.2-2 × 0.8-1.2 mm, somewhat fleshy, 1-veined, apex acuminate; lip slightly decurved, ovate-lanceolate, 1.8-2.2 × 0.8-1 mm, fleshy, shortly saccate-spurred, base dilated and concave, gradually attenuate, obscurely 3-lobed; disk slightly warty; lateral lobes obscure, ovate-triangular, margin crenulate, apex obtuse; mid-lobe ovate-triangular, ca. 0.5 mm, apex acute or obtuse; spur globose, ca. 0.5 mm. Column ca. 1 mm; pollinia subglobose; viscidia involute, hornlike. Fl. Jun-Aug. 2n = 40.
Alpine Quercus-Abies mixed forests, open places in forests, scrub, grassy slopes; 2400-4100 m. S Xizang [Bhutan, India, Kashmir, Nepal, Pakistan].