Distribution map of Bulbophyllum decurvulum
Bulbophyllum decurvulum Schltr., floral analysis, R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 233, fig. 884
Bulbophyllum decurvulum Schltr., herbarium sheet, Schlechter 19465 (isotype specimen BO)