Stems suberect, terete, slightly flattened, 4-6 cm, ca. 6 mm in diam., internodes 1-1.3 cm. Leaf blade narrowly oblong, 9.5-11 × 1.4-2 cm, slightly fleshy, base subrounded, apex obtuse and unequally bilobed. Racemes 1-2, opposite leaves, 9-11 cm, densely many flowered; floral bracts ovate-triangular, ca. 1 mm, acute. Flowers opening widely, white, tinged with purple-red, 3-4 mm in diam., anther cap white with yellowish brown midvein; pedicel and ovary ca. 4 mm. Dorsal sepal subobovate, ca. 3.5 × 1.5 mm, 3-veined, obtuse; lateral sepals slightly oblique, ovate-triangular, ca. 2.5 × 2 mm, 3-veined, acute. Petals narrowly oblong, ca. 2 × 1 mm, 1-veined, margin ± scabrous, apex obtuse; lip 3-lobed; lateral lobes erect, subquadrate, ca. 1 mm; mid-lobe obovate-spatulate, ca. 2.2 × 1.5 mm, base with a fleshy transverse appendage ± covering spur entrance, with 2 central ridges fused at apex, apex subacute; spur oblong-conic, slightly laterally compressed, ca. 2 × 1.5 mm, obtuse. Column ca. 1 mm; rostellum very short; anther cap beaked. Fl. Apr. 2n = 38.
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