大花带唇兰 da hua dai chun lan

Mischobulbum macranthum (J. D. Hooker) Rolfe.

Pseudobulbs prostrate on rhizome and then arching-ascending, narrowly cylindric, 4-9 cm × 5-7 mm. Petiole 4-5 cm; leaf blade elliptic, plicate, 14-20 × 4-7 cm, thinly papery, base truncate or subrounded, apex acuminate or shortly acuminate. Inflorescence erect, with 3 sheaths 1.5-6 cm; rachis 3-6-flowered; floral bracts ovate-lanceolate, 7-14 mm, acuminate. Flowers large, apical half bright red, basal half greenish white, spotted with bright red; pedicel and ovary ca. 15 mm. Dorsal sepal narrowly lanceolate, ca. 3.5 × 0.5-0.6 cm, 3-veined, acuminate; lateral sepals similar to dorsal sepal, ca. 3.8 × 0.7-0.8 cm, apex long acuminate, base broadly adnate to column foot forming a broadly conic mentum. Petals lanceolate, ca. 3.5 × 1 cm, 3-veined, acuminate; lip rhombic-hastate, ca. 3.5 × 2.1-2.2 cm, base cuneate, adnate to end of column foot, upper part slightly 3-lobed; lateral lobes erect, subtriangular, small, slightly obtuse; mid-lobe ovate-triangular, acute; disk with 3 lamellae, lateral 2 broader and arcuate. Column ca. 1.5 cm, winged; foot 1.1-1.5 cm. Fl. Jul-Aug.

Wooded slopes or rocky places along valleys; 700-1200 m. S and SW Guangdong, Guangxi [Vietnam].