2n = 46

2n = 46

Plant 10–25–(35) cm. tall. Stem c. 2 mm. diam., smooth, sts ± decumbent; internodes mostly rather shorter than lvs, sts very short near base. Lf-shape changing gradually from below upwards; lamina of lower lvs c. 5–10 × 2–3 cm., oval to broad-elliptic or narrow-obovate, obtuse, narrowing to broadly winged, us. short petiole; upper lvs progressively more acute, the uppermost little shorter but sessile, ovate, sts almost acuminate, often reaching but rarely overtopping fl. Fl. solitary; ovary us. erect. Dorsal sepal c. 3–4–(5) cm. tall, very slightly to much inclined in its proximal part, tip long, narrow, ± parallel-sided with only weakly involute margins, the whole often strongly curved downwards; lateral sepals diverging at a narrow angle, caudae of lobes very long, erect to strongly bent backwards or forwards. Petals much shorter than dorsal sepal, acute. Labellum narrow-triangular, arched and protruding, apex narrowly obtuse. Column shorter than labellum; stigma long-oval, rather flat.