A terrestrial herb with a short stout rhizome and fibrous roots, often forming large clumps. Erect stems typically slender, sparsely pubescent, 15-35 cm tall, leafy above covered by three sheaths below. Leaves three or four (rarely five), strongly two-ranked, suberect, commonly conduplicate, sheathing at base, lanceolate or ovate-lanceolate, acute or acuminate, 5-15 cm long, 2-8 cm wide, bluish green, pubescent on veins above and below, ciliate. Inflorescence one- or two-flowered; rhachis slender, glandular hairy; bracts leaf-like, lanceolate, acuminate, 3-8 cm long, 1-3 cm wide, pubescent and ciliate... Flowers small, showy, fragrant, the sepals and petals madder purple to maroon, glossy, the lip yellow with red spotting inside, the staminade yellow with red spotting; pedicel and ovary subsessile 1.5 cm long. Dorsal sepal suberect, lanceolateovate, acuminate, 2-4 cm long, 1.5-2.5 cm wide, undulate. Synsepal similar, slightly incurved, bifid at the apex, 2-4 cm long. Petals spirally twisted two to four times, linear-tapering, acute, 3-5 cm long, 0.5-0.8 cm wide, pubescent within in basal half. Lip porrect, obovoid to ellipsoidal, with a small mouth, 1.5-2.8 cm long, 1.2-2 cm wide, the apical margins incurved, the incurved sides with a basal pleat. Column short, 0.6 cm long; staminode subsessile, trullate, blunt, concave in apical half, 0.8-1 cm long, 0.5-0.6 cm wide; filaments extend beyond anthers, blunt to acute.