Bulbophyllum psilorhopalon Schltr., Repert. Spec. Nov. Regni Veg. Beih. 1 (1913) 881
Type: Schlechter 19378 (holo B, lost; iso AMES 2x, BO, L)
Epiphyte, pendulous, not or sparsely branched, to 60 cm long. Rhizome stem-like. Roots filiform, glabrous. Pseudobulbs cylindrical, subparallel to the rhizome, 0.7-1 by 0.3 cm; 1-leaved. Leaf elliptic, acute, 2--4.2 by 0.8-1.2 cm near the middle; base cuneate. Inflorescences 1-flowered, fascicled, developing in succession, short, with a few small peduncle-scales. Floral bracts very small, much shorter than the ovary. Sepals lanceolate, subacute, glabrous, 0.55 cm long. Lateral sepals oblique. Petals transverse; base 0.23 cm wide; in front obtusely angled, on the upper side with a short ascending arm carrying 5 stalked, subulate, acute, flexuose, glabrous appendages, in the middle with a sixth similar appendage, on the lower angular side with 4 equal, acute appendages; petals with appendages as long as the sepals. Lip fleshy, oblongoid, obtuse, 2.5 mm long; basal auricles 2, large, rounded, acute; upper side with 2 longitudinal keels; in the middle up to near the apex underneath and on the sides with large globose papillae. Column short, thick; stelidia very short, triangular, subcrenulate; column-foot somewhat incurved. Anther cucullate, umbonate, glabrous; apex notched. Ovary shortly pedicellate, glabrous, 0.3 cm long. (After Schlechter, 1913)
Colours: Sepals red, inside somewhat spotted. Petals pink with blackish-brown appendages. Lip dark red. Column white.
Habitat: Epiphyte in lowland forest; 60-500 m.
Flowering time in the wild: February, April, May.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea; see map 96-1483M.jpg.
Cultivation: Warm growing epiphyte.