乌来卷瓣兰 wu lai juan ban lan

Cirrhopetalum macraei Lindley, Gen. Sp. Orchid. Pl. 59. 1830; Bulbophyllum macraei var. autumnale (Fukuyama) S. S. Ying; B. uraiense Hayata; C. autumnale Fukuyama.

Rhizome creeping, ca. 2 mm in diam. Pseudobulbs close or 1-2 cm apart from each other, ovoid, 1-2.8 cm, 1-1.8 cm in diam., with a terminal leaf. Petiole 1-1.5 cm; leaf blade subelliptic, 8-18 × 2.5-6 cm, thickly leathery, base contracted into petiole, apex obtuse. Scape yellowish green, 10-20 cm, slender; umbel 3-5-flowered; peduncle ca. 1 mm in diam., with 2 or 3 sheaths; floral bracts lanceolate, ca. 5 mm, apex acute. Pedicel and ovary yellowish green or purplish red, ca. 9 mm. Flowers yellowish white, sometimes ± tinged with purplish red on sepals and petals. Dorsal sepal ovate-lanceolate, 15-18 × 3-5 mm, apex acuminate; lateral sepals narrowly lanceolate, 2.5-3.7 cm, twisted near base, their lower edges connate to each other, apex acuminate. Petals falcate, 5-6.5 × 2-2.7 mm, apex rounded and with apical thread; lip recurved, ligulate, 4-6.5 mm, attached to end of column foot, immobile. Column yellowish green, 2-3 mm; foot ca. 4 mm; stelidia ± twisted and thinly clavate, ca. 2 mm; anther cap subglobose, with comblike teeth at apex. Fl. Jul-Oct. 2n = 38.

Tree trunks in forests; 500-1000 m. Taiwan [India, Japan (Ryukyu Islands), Sri Lanka, N Vietnam].