Plants ascending or arching. Stems 2-30 cm. Leaves many; blade terete, 6-20 cm × ca. 2 mm, slender, fleshy, adaxially channeled, apex acute. 

Inflorescences 1-10-flowered; rachis flexuous; floral bracts ovate, ca. 4 mm. Flowers white, veins usually reddish or pinkish, fully opening; pedicel and ovary ca. 2 cm. Sepals and petals slightly twisted; dorsal sepal obovate-oblong, ca. 12 × 5 mm, apex obtuse; lateral sepals falcate-oblong obtuse, ca. 15 × 6 mm, oblique at base. Petals oblong, ca. 12 × 4 mm, base contracted, apex obtuse; lip spurred, 3-lobed; lateral lobes ca. 5 mm, erect, bilobulate, lower lobule triangular; mid-lobe oblong-ligulate, 13-20 × 7-9 mm, spreading, with 3-7 crested basal lamellae, apical margins undulate or crenulate; spur conic-cylindric, 16-20 mm, usually rigid, narrowed toward tip, ± bent forward. Column 5-6 mm, foot ca. 2 mm. Fl. Sep-Oct.