Plant at fl. c. 15–100 cm. tall. Tuber as in P. colensoi. Stem erect, ± fleshy. Lf often overtopping raceme; lamina terete, acute. Raceme of few to many fls, evenly spaced, all ± fleshy. Per. yellowish-green. Dorsal sepal c. 6–8 mm. long, broad-ovate, concave; laterals slightly longer, narrow-oblong, us. free to base, margins thin, tip often minutely cucullate and appearing bidentate. Petals little shorter, more delicate. Labellum longer, narrowed at base to very short, stiff claw, ovate, ± sharply bent at about midlength at about right angle; margin entire, us. undulate; callus a rather smooth-margined band just passing over the bend but not extending into the broad, pale, membr., subacute tip. Lateral processes of column oblong, ± falcate, as tall as rostellum. Anther sessile, definitely overtopped by rostellum. Stigma more than its own height above column-base.