Distribution map of Bulbophyllum gracilicaule
Bulbophyllum erectum Ridl., Trans. Linn. Soc. London, Bot. 9 (1916) 186 (non Thou.), J.J. Vermeulen, sketch, flower analysis, based on Kloss s.n. (Camp 6a, 3100 ft.) (holo BM)
Bulbophyllum habbemense P.Royen, Alp. Fl. New Guinea 2 (1979) 228, fig. 82, P. van Royen, drawing, based on Brass 9507 (holo L; iso AMES, BO)
Bulbophyllum habbemense P.Royen, herbarium sheet, Brass 9507 (holotype L)