Plant to c. 25 cm. tall, us. less. Stem slender, smooth, or upper internodes occ. minutely rough but not puberulous, us. green, internodes us. > lvs. Petiolate lvs in separate rosettes or at base of fl.-stem; lamina c. 5–10 × 5–10 mm., broad-ovate to orbicular-cordate, acute to subacute, veins slightly raised giving rugose surface, petiole well-defined, sts > lamina. Cauline lvs several, lowest us. petiolate and ± trulliform, those above c. 5–20 × 2–5 mm., sessile, linear-lanceolate, uppermost rarely overtopping ovary. Fl. us. solitary, erect. Dorsal sepal c. 1–1.5 cm. tall, tip acuminate, ± horizontal; lateral sepals diverging at wide angle forming U or wide W from front view, this region abruptly prominent in side view, tips long-caudate and much overtopping galea. Petals almost as long as dorsal sepal, only a narrow marginal strip exposed. Labellum narrow-triangular, arched and protruding, apex subacute. Column shorter than labellum; stigma elliptic, slightly prominent.
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