Bulbophyllum drepanosepalum J.J.Verm. & P.O'Byrne, Blumea 38 (1993) 157, fig. 1
Type: O'Byrne 068 (holo L)
Rhizome creeping, c. 1 mm diam. Pseudobudbs ovoid to ellipsoid, 0.5-1 cm apart, 0.8-1.3 by 0.4-0.6 cm, not flattened. Petiole 2-4 mm. Leaf blade elliptic, 2.9-5.5 by 1.4-2.1 cm, index 2-2.6, tip emarginate. Inflorescence usually single, c. 11 cm, 1-flowered. Peduncle c. 6 cm; bracts 3, the longest c. 6 mm. Floral bracts tubular, c. 5 mm, tip acuminate. Pedicel and ovary c. 23 mm, with the node c. 4 mm from the floral bract. Flowers little opening. Median sepal ovate, 6 7 by 1-2 mm, index 3.5-6, tip obtuse, cuneate; base rather thick, top thick; glabrous. Lateral sepals obliquely ovate, c. 23 by 4 mm, index 5.7-5.8, tip obtuse; thick; glabrous. Petals oblique, with a narrow claw and a subhastate blade, 4-4.2 by 1.8-2 mm, index 2.1-2.2, tip finely caudate (cauda c. 1 mm); margins finely erose towards the tip; rather thick; surface glabrous. Lip curved, general outline subrectangular, 2-2.5 by 0.6 mm, index 3.34.1 (not spread), tip rounded; margins finely papillose, long papillose towards the tip; thick; adaxially slightly concave in the basal half, with 2 distinct, parallel, sericeous ridges over most of its length near its base, surface otherwise glabrous; abaxially with a distinct, rounded median ridge, surface glabrous but long-papillose towards the tip. Column from ovary to the tip of the stelidia c. 1.7 mm; stigma slightly protruding at its base, slit-like; column foot without accessories. Stelidia triangular, c. 0.3 mm; tip acute; with a small, acute tooth along the upper margin, close to the tip. Anther abaxially with a ridge ending in a distinct, ovate protrusion overtopping the front margin; front margin not protruding. Pollinia 2. Stipes absent. (After Vermeulen, 1993)
Colours: Median sepal off-white with thick maroon veins. Lateral sepals deep maroon, with an off-white, maroon striped patch near the base. Petals white with 3 dark purple veins. Lip purple, green in the centre, white at the base. Column white with a purple patch on the foot.
Habitat: Epiphyte on tree trunks near the forest floor in lower montane forest; 800 m.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea; see map 96-540M.jpg.
Cultivation: Intermediate growing epiphyte, requires shaded position.