Distribution map of Bulbophyllum verruciferum
Bulbophyllum verruciferum, N. Howcroft, drawing, plant habit and flower analysis
Bulbophyllum verruciferum Schltr., floral analysis, R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 247, fig. 944