Diplocaulobium mamberamense (J.J.Sm.) A.D.Hawkes, Lloydia 20 (1957) 129.
Basionym: Dendrobium mamberamense.
Rhizome short. Pseudobulbs 0-0.4 cm apart, 1-leaved, at base ovoid, 0.85-1.2 by 0.5-0.6 cm, upper part very slender, 2-8.5 cm by 0.8-1.2 mm. Leaves linear, 6-8.5 by 0.4 cm, coriaceous, apex equally bidentate. Inflorescences 1-flowered, spathe narrowly linear, 1.2-1.5 cm long; peduncle 0.85 cm long. Pedicel 3.5 cm long; ovary 0.3 cm long. Flower c. 4 cm across. Dorsal sepal 2.6 cm by 3.4 mm; mentum 0.6 cm long, obtuse. Petals 2.5 cm by 1.3 mm. Lip 3-lobed, 1 by 0.4 cm, with two papillose keels, terminating on the midlobe in two falcate, porrect teeth, the midlobe with a verrucose callus, in front of which a second, smaller hairy callus is present; lateral lobes short; midlobe 0.5 by 0.4 cm. Column 0.25 cm long.
(after Smith, 1929).
Colours: Sepals and petals white, apices golden yellow, lip white, lateral lobes with dark purple margins and stripes, the largest callus on the midlobe yellow, the smaller yellowish-white.
Habitat: Presumably epiphyte in lowland rainforest.
Flowering time in the wild: August.
Distribution: New Guinea (endemic).
Distribution in New Guinea: Papua (Jayapura Regency: Mamberamo River).
Notes: Diplocaulobium mamberamense is closely related to Diplocaulobium scotiiforme, from which it differs in the broader leaves.
Cultivation: Warm growing epiphyte?.