Corybas arfakensis (J.J. Sm.) Schltr.

Plant: Small, 4.8 cm high terrestrial. 

Tuber: globose, 3.7 mm across.  

Stem: 28 mm high, glabrous. 

Cataphyll: 5 mm long. 

Leaves: cordate, 21 by 18 mm, shortly acuminate, apiculate, base cordate, margin wavy, midrib grooved above, prominent below.   

Bract: oblong-ovate, 5 by 2.3 mm, acuminate, glabrous. 

Ovary: 6-grooved, 6 mm long. 

Flower: purplish brown with white tip. 

Median sepal: narrowly cuneate-spathulate, curved, boatshaped, 20 by 6.7 mm, obtuse, minutely erose-crenulate at very tip only, 3-nerved at base, 9-nerved on hood, mainly the midrib prominent on outside of hood, warty on outside on hood only. 

Lateral sepals: obliquely subulate, 2.3 mm long. 

Lateral petals: obliquely subulate, falcate, 5.5 mm long. 

Labellum: from a widely tubular, ventrally inflated, basal, 5 mm long part, abruptly curved downward and spreading into a 3-lobed limb, lateral lobes obliquely orbicular, median lobe small, all lobes rounded at tip and coarsely fimbriate-laciniate, lateral margins dentate-crenulate, 3-nerved at base, 21-nerved near margin

Boss: large, glabrous; 

Spurs: conoid, falcate- curved, 2.3 mm long.   

Capsule: not seen.