大尖囊蝴蝶兰 da jian nang hu die lan

Aerides latifolia Thwaites; Doritis deliciosa (H. G. Reichenbach) T. Yukawa & K. Kita; D. latifolia (Thwaites) Bentham & J. D. Hooker; D. wightii (H. G. Reichenbach) Bentham & J. D. Hooker; Kingidium deliciosum (H. G. Reichenbach) Sweet; K. wightii (H. G. Reichenbach) O. Gruss & Roellke; Phalaenopsis wightii H. G. Reichenbach.

Stems 1-1.5 cm. Leaves 3 or 4, persistent at anthesis; leaf blade obovate-lanceolate or elliptic, 8-14.5 × 3-5.5 cm, papery, margin undulate, apex acute and slightly curved. Inflorescence often pendulous, 10-15 cm, upper part sometimes branched, densely several flowered; rachis dark green, 1.5-2.5 cm; floral bracts ovate-triangular, ca. 1 mm, acute. Flowers produced continuously and sequentially over long periods, whitish with pale purple stripes or markings; pedicel and ovary yellowish green, 0.4-0.5 cm. Dorsal sepal subelliptic, 6-7 × 3-3.5 mm, obtuse; lateral sepals obliquely ovate, 5.5-6 × 3.5-4 mm, base adnate to column foot, apex obtuse. Petals subobovate, 5-5.5 × 2.7-3 mm, obtuse; lip not clawed at base, 3-lobed; lateral lobes erect, obliquely elliptic-obovate, ca. 4 × 2.5 mm, rounded, with toothlike flaps, base decurrent and forming a broadly conic spur with base of mid-lobe, adaxially with a high lamella; mid-lobe spreading horizontally, obovate-cuneate, ca. 6 × 5 mm, apex deeply emarginate, with a thickened central longitudinal ridge, base with a flattened appendage; appendage Y-shaped, apex deeply furcate-bilobed. Column ca. 3 mm, foot ca. 2 mm; anther cap nearly subglobose, apex subtruncate and emarginate; stipe spatulate, ca. 2 mm; viscidium subelliptic. Fl. Jul. 2n = 38.

Epiphytic on tree trunks in forests, lithophytic on rocks along valleys; 300-1600 m. S and W Hainan, S and SE Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Sri Lanka, Thailand, Vietnam].

Phalaenopsis deliciosa subsp. hookeriana (O. Gruss & Roellke) Christenson (Phalaenopsis Monogr. 223. 2001; Kingidium hookerianum O. Gruss & Roellke, Die Orchidee 46(1): 23. 1995) has somewhat larger, fuller, yellow flowers and appears to represent a well-defined subspecies, although the exact range is unknown (NE India, Myanmar, and probably China). The name Doritis wightii, based on a white-flowered plant from S India, has been consistently misapplied to these plants when exported.