6. Epigeneium amplum (Lindley) Summerhayes, Kew Bull. 12: 260. 1957.
宽叶厚唇兰 kuan ye hou chun lan
Dendrobium amplum Lindley, Gen. Sp. Orchid. Pl. 74. 1830; Bulbophyllum amplum (Lindley) H. G. Reichenbach; Callista ampla (Lindley) Kuntze; C. coelogyne (H. G. Reichenbach) Kuntze; D. coelogyne H. G. Reichenbach; Epigeneium coelogyne (H. G. Reichenbach) Summerhayes; Katherinea ampla (Lindley) A. D. Hawkes; K. coelogyne (H. G. Reichenbach) A. D. Hawkes; Sarcopodium amplum (Lindley) Lindley & Paxton; S. coelogyne (H. G. Reichenbach) Rolfe.
Rhizome 4-6 mm in diam., usually branched, covered with many tubular sheaths; sheaths chestnut, ca. 2 cm, papery. Pseudobulbs borne 3-14 cm apart from one another, golden yellow when dried, ovoid or elliptic, 20-50 × 7-20 mm, 2-leaved, enclosed in membranous sheaths. Leaf blade elliptic or oblong-elliptic, 6-22.5 × ca. 5.5 cm, leathery, base contracted into petiole ca. 3 cm, apex ± obtuse and retuse. Inflorescence much shorter than leaves, 1-flowered; peduncle 1.5-2 cm, enclosed in 2 sheaths; floral bracts 1-1.7 cm. Flowers spreading, yellowish green, spotted with deep brown, large; pedicel and ovary 4.5-5 cm. Dorsal sepal lanceolate, (35-)45-65 × ca. 8 mm, acute; lateral sepals falcate-lanceolate, ca. 45 × 11-15 mm, acute-acuminate. Petals lanceolate, ca. 14 × 6 mm, acute-acuminate; lip pandurate in outline, ca. 26 mm, 3-lobed; lateral lobes erect, small; mid-lobe subrhombic, ca. 6 mm, ca. as wide as or slightly wider than disk and lateral lobes, obtuse and mucronate; disk with 3 lamellae, median slightly longer. Column ca. 15 mm, stout, foot ca. 14 mm. Fl. Nov. 2n = 40.
Lithophytic on rocks or epiphytic on tree trunks in forests or along streams; 1000-1900 m. S Guangxi, SE Xizang, SE to NW Yunnan [Bhutan, NE India, Myanmar, Nepal, Thailand, Vietnam].