黄花大苞兰 huang hua da bao lan

Ione andersonii King & Pantling, Ann. Roy. Bot. Gard. Calcutta 8: 159. 1898; I. andersonii var. flavescens (Rolfe) Tang & F. T. Wang; I. bifurcatoflorens Fukuyama; I. flavescens Rolfe; I. sasakii Hayata; Sunipia bifurcatoflorens (Fukuyama) P. F. Hunt; S. sasakii (Hayata) P. F. Hunt.

Rhizome creeping, ca. 1.5 mm in diam. Pseudobulbs 1-4 cm apart on rhizome, ovoid, 1-1.5 cm, 3-10 mm in diam., 1-leaved at apex. Leaf subsessile; blade narrowly oblong, 5-10 × 0.7-1 cm, leathery, base cuneate, apex obtuse and retuse. Scape ca. 3 cm; raceme few flowered; floral bracts ovate-lanceolate, ca. 10 × 5 mm. Pedicel and ovary ca. 1 cm. Flowers pale yellow or yellowish green, with deep yellow lip. Sepals free, similar, ovate-lanceolate, 7-10 × 3-5 mm, apical margins ± incurved, apex acute and recurved. Petals narrowly ovate-lanceolate, 5-6 × 2-2.5 mm, abruptly contracted above middle and cylindric-thickened, inconspicuously 3-veined, basal margins fimbriate, apex obtuse; lip ovate, 5-6 × ca. 2.5 mm, base with 1 fleshy transverse callus, incised margined in basal half, apex obtuse. Column 1-1.5 mm, with a foot 1(-5) mm; rostellum horseshoe-shaped; each pair of pollinia with a stipe and a viscidium. Fl. Sep-Oct.

Tree trunks in forests; 700-1800 m. Taiwan, S and W Yunnan [Bhutan, NE India, Myanmar, N Thailand, N Vietnam].