Description from Flora of China
Habenaria acuifera Lindley var. rostrata (Lindley) Finet.
Plants 20-30 cm tall. Tubers oblong, 2-3 × 0.8-1 cm, fleshy. Stem erect, terete, glabrous, with 4 or 5 leaves and 4-8 bractlike leaflets. Leaf blade oblong or oblong-lanceolate, 5-10 × 0.7-1 cm, base amplexicaul, apex acute. Raceme many flowered, sometimes nearly corymbiform, 4-6 cm; floral bracts lanceolate, shorter than ovary, ciliate, apex aristate; ovary twisted, arching, cylindric-fusiform, including pedicel 15-16 mm. Flowers reddish orange, with greenish sepals. Dorsal sepal forming a hood with petals, erect, broadly elliptic, concave, ca. 4.5 × 3 mm, 3-veined, apex obtuse; lateral sepals reflexed, obliquely ovate-elliptic, ca. 6.5 × 4 mm, 3-veined, apex obtuse. Petals obliquely broadly oblong, falcate, ca. 4.5 × 2 mm, 1-veined, margin ciliate, apex obtuse; lip ca. 10 mm, spurred at base, with a 3-lobed, ring-shaped structure near mouth of spur, shortly 3-lobed, lobes linear; lateral lobes extremely bifid, ca. 7 × 0.6 mm, apex acuminate; mid-lobe ca. 8 × 1 mm, apex obtuse; spur pendulous, cylindric-clavate, 11-12 mm, slightly shorter than ovary, slightly dilated toward apex; connective narrow; pollinia ellipsoid; caudicles linear, slender; viscidia linear; stigmas oblong, ca. 2 mm. Fl. Jul-Aug.
Forests, forest margins, thickets; 900-2000 m. S Sichuan, C and S Yunnan [Laos, Myanmar, Thailand, Vietnam].