Stems subterete, 20-45 cm, ca. 5 mm in diam., sometimes branched, with many nodes, internodes 2-3 cm. Leaves distichous, flat, narrowly lanceolate, 9-15 × 7-13 mm, leathery, acute. Inflorescences several, opposite to leaves, arising from upper part of stem, ascending, shorter than leaves, unbranched, laxly many flowered; floral bracts ovate-triangular, ca. 1 mm. Flowers opening widely, sepals and petals yellowish green with purplish red stripes, lip purple-red; pedicel and ovary ca. 5 mm. Dorsal sepal subelliptic, cymbiform, 5-5.5 × 2-2.5 mm, acute; lateral sepals slightly obliquely obovate, 5-5.5 × 2.5-3 mm, obtuse. Petals suboblong, ca. 4 × 2 mm, obtuse; lip lateral lobes erect, subtriangular, apex abruptly contracted and subulate; mid-lobe narrowly ovate-lanceolate, slightly fleshy, acuminate; spur somewhat funnel-shaped, straight, ca. 5 mm, attenuate toward end, obtuse, slightly septate; back wall callus oblong, central part longitudinally concave, base shallowly bilobed and glabrous. Column ca. 2 mm; rostellum ca. 1.3 mm; anther cap beak ca. 1.5 mm; stipe slender, apical part slightly enlarged; viscidium suborbicular, very small. Fl. Jul-Aug. 2n = 38.
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