Plant to c. 35 cm. tall at fl., us. less. Stem us. erect, smooth, internodes < lvs. Lvs mostly 3–5, the size changing from below upwards, the largest lf on a stem c. 4–15–(18) cm. × 5–12 mm.; all linear-lanceolate, ± keeled, acuminate, widest near sheathing base, us. overtopping fl. Fl. solitary, ovary us. erect. Dorsal sepal (1.5)–2.5–3 cm. tall, the erect part us. long and the ± horizontal part proportionately rather short, acuminate to shortly caudate; lateral sepals diverging at a narrow angle, tips acuminate to shortly caudate, not greatly exceeding galea. Petals little shorter than dorsal sepal, tips narrow-acuminate. Labellum narrow-triangular and protruding, gently arched but us. curled sharply downwards at the narrow, cucullate, obtuse tip; midrib evanescent distally, proximally prominent and ± papillose, terminating basally in a projecting dark callus. Column almost as tall as labellum; stigma long, narrow.
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