Distribution map of Bulbophyllum filamentosum
Bulbophyllum filamentosum Schltr., J.J. Vermeulen, sketch, lip, front- and lateral view, based on Reeve 3318
Bulbophyllum filamentosum Schltr., floral analysis, R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 254, fig. 967