Herbs, terrestrial or lithophytic. Stem green, cylindric, 8-20 cm, ca. 1 cm in diam., thick, fleshy, with many nodes, lower part covered with several membranous sheaths. Leaves 3-6; petiole sheathlike, 2-5 cm, amplexicaul, not articulate; blade elliptic, ovate-elliptic, or ovate-oblong, often slightly oblique, 9-17 × 3.5-9 cm, membranous or herbaceous, base oblique and contracted into petiole, apex acuminate, shortly caudate, or subacute. Inflorescence subterminal, 18-45 cm; rachis 6-16 cm, several to 20-flowered, very narrowly winged; floral bracts ovate, 1-2 mm. Flowers deep purplish red; pedicel and ovary 1.6-1.8 cm. Dorsal sepal linear-lanceolate, 16-20 × 2.5-3 mm, 3-veined, apex obtuse; lateral sepals ovate-lanceolate, 15-17 × 4-5 mm, 5-veined, apex obtuse. Petals linear or narrowly linear, 16-18 × ca. 0.8 mm, 1-veined; lip obovate-elliptic or broadly obovate-oblong, 9-15 × 12-18 mm, base abruptly contracted and with a pair of backward spreading auricles, margin conspicuously denticulate, apex truncate and sometimes mucronulate; disk with 2 calli near base; calli triangular, 0.8-1 mm tall. Column 6-8 mm, with narrow wings on both sides; anther cap ca. 2 mm. Capsule obovoid-oblong, ca. 2.8 × 1 cm; fruiting pedicel 6-9 mm. Fl. Feb-May, fr. Nov.
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