Bulbophyllum xanthochlamys Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 864
Type: Schlechter 19844 (holo B, lost; iso AMES, BO)
Rhizome pendulous, up to 45 cm long, 2-6 mm diam. Pseudobulbs ovoid to cylindrical, 1-7 cm apart, 0.5-6 by 0.3-0.8 cm, either flattened or not. Petiole 1-8 mm. Leaf blade ovate to elliptic, 1.2-12 by 0.6-4.2 cm, index 2-4.2, tip acute. Inflorescence 1.35.5 cm, 3-10-flowered. Peduncle 0.4-1.2 cm; bracts 2-4, the longest 5-7 mm. Rachis 0.9-4.5 cm. Floral bracts ovate, triangular, 1.8-7 mm, tip acute. Pedicel and ovary 2.53.5 mm, with the node 1.2-2 mm from the floral bract. Flowers moderately opening. Median sepal ovate to elliptic, 2.5-4.5 by 0.8-1.5 mm, index 2.3-3, tip short acuminate; rather thick; glabrous. Lateral sepals free, ovate, 2.5-5.5 by 0.8-1.5 mm, index 2.3-3.8; otherwise as the median sepal. Petals obovate, 1.5-2.4 by 0.7-1 mm, index 2-2.4, tip obtuse to subacute; margins somewhat papillose towards the tip; rather thin; surface glabrous. Lip slightly curved, general outline ovate to subrectangular, 1-2.2 by 0.5-1 mm, index 2-2.6 (not spread), tip obtuse to subacute; margins and surface papillose towards the tip; thick; adx. with a basal concavity, basal teeth converging, together forming a transverse ridge, basal part of the lip slightly concave, passing with an obtuse median knob into the slightly concave top part of the lip; abx. without a median ridge. Column from ovary to the tip of the stelidia 0.5-1 mm; rostellum not protruding; stigma approx. orbicular, slightly protruding at its base or not; column-foot with a rounded central knob above the attachment of the lip. Stelidia inconspicuous, triangular, tip acute. Anther abx. with a wide ridge towards its base; front margin not protruding. (After Vermeulen, 1993)
Colours: Sepals and petals white to greenish yellow. Lip white to orange red.
Habitat: Epiphyte in lower montane forest; terrestrial between mossy shrubs on swampy ground on granite; 900-2900 m.
Flowering time in the wild: March, April, June, October.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia); Papua New Guinea; see map 96-2001M.jpg.
Cultivation: Intermediate growing epiphyte.