Distribution map of Bulbophyllum longirostre
Bulbophyllum longirostre Schltr., J.J. Vermeulen, sketch, plant habit and flower analysis
Bulbophyllum longirostre Schltr., floral analysis, R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 260, fig. 992