Bulbophyllum leptoleucum Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 860
Type: Schlechter 19860 (holo B, lost); neo: Carr 10363 (AMES; isoneo K, L 2x, LAE, NY, chosen by Vermeulen 1993)
Rhizome approx. pendulous, up to 45 cm long, 1-2 mm diam. Pseudobulbs ovoid to cylindrical, 0.3-2.5 cm apart, 0.8-3 by 0.15-0.5 cm, not or hardly flattened. Petiole 17 mm. Leaf blade ovate to elliptic, 1.2-4.5 by 0.3-0.8 cm, index 3.3-7, tip acute. Inflorescence 1-3.5 cm, 3-5-flowered. Peduncle 0.4-1 cm; bracts 2-3, the longest 3-6 mm. Rachis 0.6-2.5 cm. Floral bracts ovate to triangular, 2-3.5 mm, tip acute. Pedicel and ovary 1.2-1.9 mm, with the node 0.2-1.2 mm from the floral bract. Flowers widely opening. Median sepal ovate to elliptic, 2-4.2 by 0.7-1.3 mm, index 2.2-3.5, tip acute to long acuminate; rather thin; glabrous. Lateral sepals free, oblique, ovate, 2.2-4 by 0.71.3 mm, index 2.5-4.2; otherwise as the median sepal. Petals oblique, elliptic to obovate, 1-2 by 0.3-0.8 mm, index 1.7-5, tip rounded to acute; margins often slightly erose and/or papillose; thin; surface glabrous. Lip almost straight to curved, general outline approx. ovate to elliptic, 1-1.5 by 0.4-1 mm, index 1.1-3 (not spread), tip rounded to shortly acuminate; thick; approx. glabrous or somewhat papillose; adx. with a basal concavity, basal teeth converging, together forming a transverse ridge with a notch or a slit half-way, basal part of the lip often slightly concave, gradually passing into the convex top part of the lip; abx. without a median ridge. Column from ovary to the tip of the stelidia 0.4-0.7 mm; rostellum not or hardly protruding; stigma obovate, protruding at its base; column-foot with an almost straight or very slightly incurved, rounded central knob above the attachment of the lip. Stelidia inconspicuous, triangular, tip truncate to rounded. Anther abx. with a wide ridge, front margin not protruding. (After Vermeulen, 1993)
Colours: Sepals and petals white, cream coloured or pale yellow. Lip white to yellow.
Habitat: Epiphyte in lower montane forest; 1100-2300 m.
Flowering time in the wild: June, August, September, October.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia); Papua New Guinea; see map 96-983M.jpg.
Cultivation: Intermediate growing epiphyte.