Distribution map of Bulbophyllum inquirendum
Bulbophyllum inquirendum J.J.Verm., Orchid Monogr. 7 (1993) 76, fig. 35, J.J. Vermeulen, drawing, plant habit and flower analysis, based on Reeve 6641 (holo K; iso L)
Bulbophyllum inquirendum J.J.Verm., herbarium sheet, Reeve 6641 (isotype L)