Thrixspermum collinum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 959
Type: Schlechter 16148 (holo B, lost; iso AMES, BO, E, K, L, NSW)
Epiphytic, stout, erect or pendent; roots filiform, glabrous. Stem elongated to 20 cm long, somewhat flattened, many-leaved, entirely covered with the laterally flattened, striate-veined leaf-sheaths, c. 0.5 cm wide. Leaves patent, ligulate, unequally and obtusely bilobulate, 8-15 cm long, near the middle 1.5-2.5 cm wide. Inflorescence long pedunculate, c. 15 cm long, ancipitous, gradually elongated; apical part of the peduncle as well as the rachis flattened. Floral bracts conduplicate, falcate, apiculate, about as long as the ovary. Flowers showy, opening in succession. Sepals linear-lanceolate, strongly acuminate-elongated, 3.5 cm long. Lateral sepals at the base subfalcate. Petals linear, elongated-acuminate, almost as long as the sepals, glabrous. Lip at the base oblongoid-saccate, above the base semiorbicular, 3-lobed above the middle, 1.8 cm long, when flattened 1.1 cm wide near the middle; lateral lobes short, falcate, apex truncate, 3-4-dentate; mid-lobe c. 3-4 times as long, cylindrical-swollen, subobtuse; in basal third of the lip with a linear, retuse appendage; inside at the apex of the sac with a semiglobose, densely papillose callus. Column cylindrical, glabrous. Ovary slender, glabrous, c. 1.2 cm long. (After Schlechter, 1911-1914)
Colours: Flowers yellowish white, lip with brown dots, basal callus brownish yellow.
Habitat: Epiphyte in lowland forest; 10 to 150 m.
Flowering time in the wild: April, June.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea. See map: 690-57M.JPG.
Cultivation: Warm growing epiphyte.