挺茎贝母兰 ting jing bei mu lan

Pseudobulbs on stout, creeping, heavily sheathed rhizome, 3-5 cm apart, suboblong or oblong-cylindric, to 9 × ca. 1.3 cm, somewhat attenuate toward apex, with 2 leaves at apex. Leaf blade suboblong-oblanceolate, 27-30 × 4.6-5 cm, leathery, base cuneate, apex acuminate; petiole 4-6 cm. Inflorescence hysteranthous, ca. 20 cm, with 10 imbricate, convolute, sheathing sterile bracts at interface between peduncle and rachis forming a tube 3.5-4 cm; rachis 8-flowered, slightly flexuose; floral bracts not completely deciduous at anthesis, ovate-lanceolate, 1.8-1.9 cm; pedicel and ovary 7-8 mm. Flowers small. Dorsal sepal suboblong-elliptic, 8-10 × 4-5 mm, 3-veined; lateral sepals suboblong, 9-11 mm, slightly narrower than dorsal sepal, 3-veined. Petals linear, ca. 9 × 1 mm, 1-veined; lip subovate, 8-10 mm, 3-lobed; lateral lobes erect; mid-lobe nearly elliptic, 3-4 mm, margin somewhat undulate, apex emarginate; callus with 3 longitudinal lamellae; lamellae conspicuously crisped, extending to mid-lobe, median lamella shorter. Column slightly arcuate, 5-6 mm, both sides winged; wings below middle very narrow, upper part slightly wider, ca. 0.5 mm wide on one side. Fl. Jun-Jul.

On trees in forests in limestone areas; 700-800 m. S Yunnan [NE India, Myanmar, Thailand, Vietnam].