Diplocaulobium ischnopetalum (Schltr.) Kraenzl., in Engl., Pflanzenr. IV. 50. II. B. 21 (1910) 333.
Basionym: Dendrobium ischnopetalum.
Rhizome short, roots elongated, filiform, flexuose, glabrous. Pseudobulbs crowded, 1-leaved, slender, to the base ovoid-widened, 3-13 by 1.3 (at the base) to 0.2-0.3 cm (near the apex). Leaves linear to linear-oblong, 9-12 by 0.5-1 cm, apex obtuse, unequally bilobulate, coriaceous. Inflorescences arising in succession from the apex of the pseudobulb, 1-flowered. Pedicel and ovary 1.5-2 cm long, slender, glabrous. Flower resupinated, c. 6 cm wide. Dorsal sepal lanceolate, to the apex filiform-elongated, 3 cm long. Lateral sepals obliquely lanceolate, to the apex filiform-elongated, to the base much widened, 3 cm long; mentum obtuse. Petals linear, to the apex filiform-elongated, c. 2.8 cm long. Lip weakly 3-lobed in the middle, 1.2 by 0.6 cm (across the midlobe), with two keels extending from the base to a little below the apex, initially parallel, slightly diverging from the middle onwards, then abruptly converging distally, with a low ridge in between; lateral lobes short, obtuse; midlobe suborbicular with an obcuneate claw, apex abruptly acuminate. Column short, clinandrium with an acute median tooth; column-foot well-developed. Anther subglobose-cucullate, glabrous, in front truncate-sublobulate.
(after Schlechter, 1905).
Colours: Flowers pink, lip yellow in the centre.
Habitat: Epiphyte in hill forest. Altitude 550 m.
Flowering time in the wild: July.
Distribution: Bismarck Archipelago (endemic).
Distribution in New Guinea: Papua New Guinea (New Ireland).
Cultivation: Warm growing epiphyte.