斑叶杜鹃兰 ban ye du juan lan

Oreorchis unguiculata Finet, Bull. Soc. Bot. France 43: 698. 1897; Aplectrum unguiculatum (Finet) F. Maekawa.

Plants 20-40 cm tall. Pseudobulbs ovoid or subglobose, ca. 1.5 cm in diam., 3- or 4-noded. Leaves 2, deep green and usually blotched with purple, narrowly elliptic, 10-15 × 2-3 cm, base cuneate, apex acuminate or acute; petiole-like base 2.5-6 cm. Inflorescence erect, to 30 cm, slender; rachis 10-13 cm, laxly 7-9-flowered; floral bracts ovate-lanceolate, 4-5 mm. Flowers suberect, opening widely, outer surface purplish brown, inner surfaces green, spotted with purplish brown, lip white; pedicel and ovary 9-13 mm. Sepals linear-oblanceolate or narrowly oblanceolate, 17-22 × ca. 2.5 mm, apex acute; lateral sepals slightly oblique. Petals narrowly oblanceolate, 15-20 × 1-1.5 mm, apex acute; lip narrowly spatulate, 13-18 × ca. 2.5 mm (though wider across lobes), 3-lobed above middle; lateral lobes linear, 1-1.5 mm, apex acute or obtuse; mid-lobe strongly deflexed, obovate, 5-6 × 2.5-3.5 mm, margin crisped and irregularly dentate-incised, apex obtuse; disk with a fleshy callus near base of mid-lobe; callus pulvinate, ca. 2 mm. Column 12-13 mm, slender. Fl. May-Jun. 2n = 50.

Mixed forests; 900-1000 m. Jiangxi [Japan, Korea].