紫苞舌蘭

Pseudobulbs ovoid or conic, ca. 3 cm long. Leaves 3-5, nearly distichous, linear-lanceolate, 30-80 cm long, 5-7 cm wide, apex acuminate or acute, base cuneate, distinctly plicate; petiole 10-20 cm long. Peduncle purplish, 50-80 cm long, with many tubular scales; bracts lanceolate, ca. 1.5 cm long; pedicel slender, 1-2 cm long; ovary cylindrical, 1.5 cm long. Flowers ca. 10, opening successively, purple; sepals ovate, 1.5-1.8 cm long, 8-10 mm wide, acute, 5-7-nerved, keeled outside; petals broadly obovate, 1.8 cm long, 1.2-1.4 cm wide, obtuse or rounded at apex, contracted at base; lip 1.6-2.3 cm long, 3lobed, lateral lobes falcate or elongate rectangular, 6-8 mm long, 2 mm wide, erect below lower part of column, truncate at apex, central lobe 13-15 mm long, lower part long clawed, apical part dilated and flabellate, apex truncate, often emarginate or 2-lobed, with 2 fleshy hirsute calli on disc near base; column 1.5 cm long, curved, slightly dilated at apex.

TAITUNG: Lanyu Is., Su 25; Su 7004*.

Sri Lanka, India, Indochina, the Philippines, the Malay Peninsula, Indonesia, Papua New Guinea and the Caroline Islands. Taiwan, common in rather sunny places at forests margins on Lanyu Is. and the southeastern islets.