滇西贝母兰 dian xi bei mu lan

Pseudobulbs 3-4 cm apart on a stout, creeping, sheathed rhizome, ovoid, 5-10 cm, angled, with 2 leaves, enclosed with persistent bracts at base. Leaf blade oblong-lanceolate or oblong-obovate, 13-20 × 4-5.5 cm, abaxially minutely verrucose, many veined, prominent abaxially, somewhat acute; petiole 3.8-6 cm, narrow. Inflorescence hysteranthous, erect, rigid; peduncle bare, 7-15 cm, with 6 or 7 densely imbricate, convolute, sheathing sterile bracts at interface between peduncle and rachis; rachis 5-7 cm; flowers up to 6, opening simultaneously. Flowers spreading, sepals and petals creamy white. Dorsal sepal oblong-lanceolate, ca. 28 × 14 mm, 7-9-veined, somewhat acute; lateral sepals oblong-lanceolate, ca. 27 × 9 mm, 7-9-veined, somewhat acute. Petals linear, ca. 26 × 3.5 mm, 3-veined, obtuse; lip ca. 27 × 25 mm, 3-lobed; lateral lobes small compared with remainder of lip, rounded, front margin fimbriate; mid-lobe quadrangular, ca. 13 × 14 mm, margin long fimbriate except around tip; callus with 2 lamellae extending from base of lip and reaching middle of mid-lobe, fimbriate, toward tip keels broadening into a warty protrusion. Column slightly arched, ca. 17 mm, hood winged. Fl. Apr-May.

On trees; 900-1500 m. SW Yunnan [Laos, Myanmar, Thailand, Vietnam].

This plant was first reported from Yunnan by Seidenfaden (Dansk Bot. Ark. 29(4): 71. 1975), based on Forrest 18715 (K). It is similar to Coelogyne sanderae in having a fimbriate-margined lip and three fimbriate-hairy lamellae. But in the specimen collected from Yunnan, the central lamella is very short (3-4 mm), and the lateral two lamellae are almost not fimbriate when extending to mid-lobe.