Oreorchis nepalensis N. Pearce & P. J. Cribb Edinburgh J. Bot. 54: 315. 1997.

大花山兰 da hua shan lan

Plants 20-40 cm tall. Pseudobulbs oblong-ovoid to subquadrate, 1.5-2 × 0.8-1 cm, several noded, persisting and forming a chain of pseudobulbs connected by a short rhizome. Leaf solitary, lanceolate, plicate, 15-30 × 0.8-1.7 cm, with conspicuous veins, tapering at base into a petiole-like stalk 5-10 cm, apex acute. Inflorescence 17-35 cm, with 2 tubular sheaths below middle; rachis 5-12 cm, subdensely 9- to more than 20-flowered; floral bracts lanceolate, ca. 5 mm. Flowers brownish green or yellowish green, lip pale pink to white with purple spots; pedicel and ovary ca. 12 mm. Dorsal sepal linear-lanceolate, 15-16 × ca. 3 mm, apex subacute; lateral sepals broadly lanceolate, falcate, ca. 12 × 3 mm, apex acute. Petals oblong-lanceolate, ca. 13 × 3 mm, apex obtuse; lip obovate, 11-12 × ca. 6 mm, base long clawed, 3-lobed near middle; lateral lobes slightly incurved, oblong, ca. 4 × 1.2 mm, apex obtuse; mid-lobe ovate-elliptic, ca. 7 × 6 mm, margin undulate, apex rounded; disk with a pair of crescent-shaped lamellae between lateral lobes and extending to base of mid-lobe. Column ca. 8 mm, slightly dilated at base. Fl. May-Jun.

Scrub, damp open meadows. S Xizang [Nepal].