撕裂贝母兰 si lie bei mu lan

Coelogyne darlacensis Gagnepain; C. ridleyi Gagnepain.

Rhizome stout, 6-8 mm in diam., covered with scaly sheaths, with rather short internodes. Pseudobulbs 1.5-3 cm apart on rhizome, yellowish when dried, lucid, usually narrowly ovoid to narrowly ovoid-oblong, 3-8 × 1-2 cm, with 2 leaves at apex and several sheaths at base. Leaf blade oblong to oblong-lanceolate, 9-20 × 2.8-4.6 cm, apex acuminate; petiole 1.5-4 cm. Inflorescence hysteranthous, 20-25 cm, somewhat stout, with 10 imbricate, convolute, sheathing sterile bracts at interface between peduncle and rachis forming a tube 2.5-4.5 × 0.6-0.8 cm; rachis 4-6-flowered; floral bracts caducous; pedicel and ovary 15-20 mm. Flowers white, with yellow spots on lip. Sepals oblong or oblong-lanceolate, 26-30 × 8-10 mm, apex acuminate. Petals linear, ca. 28 × 2 mm; lip subovate, 25-29 × 20-24 mm, 3-lobed; lateral lobes erect, nearly suborbicular, margins ± dentate or shortly fimbriate; mid-lobe nearly broadly ovate or oblong, 10-13 × 9-11 mm, margin irregularly dentate or shortly fimbriate; callus with 3 lacerate-fimbriate brownish lamellae extending to mid-lobe, median lamella slightly shorter. Column arcuate, ca. 17 mm, both sides winged; wings widened from base to apex, upper part ca. 1.5 mm wide on one side, apex obtuse. Capsule nearly narrowly obovoid, trigonous, 3.3-3.6 × ca. 1.5 cm. Fl. Mar-Apr, fr. Jun.

On tree trunks or rocks at forest margins; 1000-2300 m. S Yunnan [Myanmar, Vietnam].