Plants up to 33 cm tall, erect. Leaves up to 6, basal, rosulate, subsessile; blade up to 7.5 X 2 cm, elliptic to oblanceolate, acute, tapering basally, glabrous. Peduncle erect with
several loose-fitting, lanceolate, acuminate sheaths, glabrous basally, toward the rachis puberulent, terminating in a many-flowered, dense, elongate, cylindrical, raceme up to
10 cm long. Flowers small, greenish, sepals glandulose-puberulent externally. Floral bracts up to eight mm long, lanceolate, acuminate, glandulose-puberulent. Pedicellate ovary up to
10 mm long, glandulose-puberulent. Dorsal sepal up to 5 X 1.5 mm, narrowly ovate to ovate-elliptic, obtuse, 3-veined. Petals shortly unguiculate; blade up to 4.5 X 2.5 mm, apically coherent with the dorsal sepal, prominently bilobed, obliquely semirhombic to triangular-dolabriform in general outline with rounded angles, with the anterior margin
minutely ciliolate, 2-veined. Lateral sepals up to five mm long and two mm wide, free to the base, obliquely ovate to elliptic-ovate, obtuse, glandulose-puberulent externally, 3-veined. Lip sessile, up to 3.5 X 3 mm, ecallose; lamina orbicular, concave to gibbose apically 3-lobed; lateral lobes suborbicular; middle lobe 0.7–1  0.8–0.9 mm, suborbicular
to ligulate-spathulate lobule; disc sparsely glandulose-verrucose, from the base to the middle with 3–7 veins, thin. Gynostemium 2.5 mm long in total, shortly stalked (Fig. 3).
Ecology: Terrestrial. Flowering in January.

Notes: This species shares with P. rostrata a sessile or subsessile lip, but can be easily separated from the latter by its prominently bilobed petals, with somewhat upcurved lateral lobe. In other species of this group the lip is more or less unguiculate and petals are auriculate rather than having a lateral, upcurved lobe. The exception in the petals shape is
P. rostrata with basally truncate petals but without prominent lobation