Cepobaculum trilamellatum (J.J.Sm.) M.A.Clem. & D.L.Jones, Orchadian 13(11): 486 (2002).
Dendrobium trilamellatum J.J.Sm., Bull. Dept. Agric. neerl. 19: 21 (1908); Nova Guinea 8: 69-70, t. 24, 76 (1909). Types: Dutch New Guinea [Irian Jaya]; Merauke, Jan. 1901, Jaheri s.n. (syn BO); between Geelvink Bay and MacCluer Gulf, 1906, W. den Berger s.n. (syn BO).
Altitude: 50-300 m.
Also found in New Guinea.
Epiphytic or lithophytic herb forming slender erect clumps. Rhizome superficial, branched. Pseudobulbs erect, fusiform, 30-60 cm x 2-2.5 cm, green. Leaves 3-7 per pseudobulb, erect to prostrate, apical; lamina linear to lanceolate, 10-25 cm x 1-1.5 cm, green, leathery, not channelled. Inflorescence an axillary raceme, erect, 300-500 mm long, from apical nodes. Flowers 6-15, resupinate, porrect, star-shaped, 35-55 mm x 40-60 mm, brown with darker stripes and tips, centre often yellowish, labellum mauve to purple with yellow midlobe. Sepals and petals thick, shiny, strongly twisted. Dorsal sepal free, 20-30 mm x 4-7 mm. Lateral sepals 20-30 mm x 7-9 mm, bases fused to column foot. Petals 25-35 mm x 3-6 mm. Labellum 15-22 mm x 8-14 mm; lateral lobes erect, entire; midlobe as wide or wider than the lateral lobes, broadly triangular, curved, with 3 prominent longitudinal ridges that extend well onto the midlobe. Column 4-5 mm long. Capsules pendulous, dehiscent.
Occurs in open forests and woodlands, near streams and in swamps, often close to the coast. It is usually found growing on rough-barked and paper-barked trees. The long-lasting flowers have a pleasant perfume and are pollinated by wasps and hornets.
Flowering period: July-November
Until recently known as Dendrobium trilamellatum.