43. Bulbophyllum violaceolabellum Seidenfaden, Nordic J. Bot. 1: 210. 1981.
等萼卷瓣兰 deng e juan ban lan
Rhizome stout, creeping, 4-6 mm in diam., rooting. Pseudobulbs 4-9 cm apart on rhizome, ovoid, 1.5-3.4 cm, 1-1.3 cm in diam., with a terminal leaf. Petiole conduplicate, 1.5-2 cm; leaf blade oblong to obovate-oblong, 10-20 × 2.2-4.3 cm, slightly fleshy or leathery, apex obtuse. Scape from base of pseudobulb, erect, 19-26 cm; raceme shortened, umbel-like, often 3-5-flowered; peduncle 2-3 mm in diam., with 3 or 4 tubular sheaths 8-13 mm; floral bracts lanceolate, ca. 5 mm, apex acuminate. Pedicel and ovary ca. 2.2 mm. Flowers widely opening, with yellow and purplish spotted sepals and petals and purple lip. Dorsal sepal broadly ovate, 6-8 × ca. 6.2 mm, margin slightly undulate, apex obtuse; lateral sepals ovate-triangular, 8-9 × ca. 8 mm, base adnate to column foot, apex mucronate. Petals ovate-lanceolate, 4-5 × ca. 3 mm, entire, aristate; lip strongly recurved, ligulate, ca. 5 × 3 mm, fleshy, base attached to end of column foot by a mobile joint, apex truncate. Column yellow, ca. 2 mm, base ca. 3 mm in diam., with wings decurrent to foot; foot purple, ca. 5.5 mm, with free part ca. 2.5 mm; stelidia subulate, ca. 2.5 mm. Fl. Apr.
Trees or rocks in open forests in limestone areas; ca. 700 m. S Yunnan [Laos].