Epiblastus tuberculatus R.S.Rogers, Trans. & Proc. Roy. Soc. South Australia 49 (1925) 256
Type: Lane-Poole 373 (holo BRI; iso L)
Pseudobulbs 9 cm or less long, subterete or flattened, grooved, slightly swollen towards the base, covered in the lower part or entirely with large acute sheaths, 1-leaved. Leaf erect, glabrous, linear-lanceolate, subacute, unequally bilobed at the apex, many-nerved, mid-rib very prominent in the basal part, 30-47.5 by 2-2.5 cm, conduplicate towards the base. Inflorescences 15-24, fascicled. Peduncles 1-flowered, very slender, 1-seriate, 12-14 cm long. Floral bract subulate. Flowers beset with numerous resinous tubercles, glabrous, 0.8 cm long, 0.6 cm wide, subquadrate. Median sepal oblong-elliptic, broadly obtuse, 5-nerved, subacute, erect, 0.7 by 0.3 cm. Lateral sepals obliquely triangular, 5-nerved, subacute, erect, front margins free, about 0.85 cm long, adnate by their base to the column-foot forming a short obtuse mentum. Petals elliptic, subacute, erect, 5-nerved, about 0.6 by 0.28 cm. Lip clawed, well exceeding the anther and shorter than the sepals, erect-recurved, concave, several-nerved, almost 3-lobed, about 0.9 by 0.7 cm; the claw oblong, fleshy, about 0.25 cm long, adnate for its whole length along the. middle line to a knife-edged crest on the apical part of the column-foot; the blade (spread out) trapezoid, the lateral lobes obtusely triangular with entire margins clasping the column, the mid-lobe much narrower obtusely triangular, recurved with crenulate margins ; at the bend between the lateral lobes with a large transverse somewhat fleshy arcuate callus. Column about 0.35 cm long; clinandrium deeply excavated, the dorsal lobe narrower, and slightly longer than the broad obtuse lateral ones. Pollinia 8. Stigma very large, deeply concave. Column-foot more or less at right angles to the ovary, about 0.3 cm long, with a narrow triangular crest extending along its centre from the base of the column to the claw of the lip. Ovary and pedicel slender, about by 1.5-2 cm long, tuberculate. (After Rogers, 1925).
Colours: Flower reddish brown.
Habitat: Epiphyte in montane forest. Altitude 1200-1219 m.
Flowering time in the wild: February.
Distribution: Malesia (New Guinea, endemic).
Distribution in New Guinea: Papua (Indonesia).
Cultivation: Intermediate growing epiphyte.