73. Bulbophyllum amplifolium (Rolfe) N. P. Balakrishnan & Sud. Chowdhury, Bull. Bot. Surv. India. 9: 89. 1967.
大叶卷瓣兰 da ye juan ban lan
Cirrhopetalum amplifolium Rolfe, Notes Roy. Bot. Gard. Edinburgh 8: 21. 1913.
Rhizome creeping, 6-10 mm in diam., densely covered with membranous sheaths. Pseudobulbs ca. 10 cm apart from each other, ovoid-cylindric, 5-8 cm, ca. 1.5 cm in diam., with a terminal leaf. Petiole 4-7 cm; leaf blade elliptic or elliptic-oblong, (8-)10-21 × ca. 8.5 cm, leathery, base subrounded, apex obtuse. Scapes 1 or 2, from base of pseudobulbs, erect, 15-30 cm; umbel 4-8-flowered; peduncle 3-4 mm in diam., sparsely with 3-5 tubular sheaths; floral bracts lanceolate or oblong-lanceolate, 8-13 mm. Pedicel and ovary 1.5-2 cm. Flowers large, yellowish brownish. Dorsal sepal suborbicular, concave, ca. 1 × 1 cm, densely finely papillate, apical margins slightly denticulate, apex with a clavate-tipped awn ca. 8 mm; lateral sepals lanceolate, 4.5-5.5 cm, base adnate to column foot and twisted above it, their upper and lower edges connate to each other except apices. Petals ovate-triangular, ca. 4 × 3 mm, margins comblike, apex with a long clavate-tipped awn; lip recurved, without auricles, ovate-oblong, ca. 6 mm, fleshy, base subcordate, apex obtuse. Column ca. 3 mm; foot ca. 4 mm, with free part ca. 3 mm; stelidia strongly curved downward, hook-shaped and fusiform, ca. 5 mm; anther cap toothed at apex. Fl. Oct-Nov.
Rocks at broad-leaved forest margins; 1700-2000 m. S Guizhou, SE Xizang, W Yunnan [Bhutan, NE India, Myanmar].