Smith, J.J., Nova Guinea 12, 4 (1916) 372, t. 135, fig. 253, as Bulbophyllum palilabre J.J.Sm.
Schlechter, R., Repert. Spec. Nov. Regni Veg. Beih. 21 (1928) t. 280, fig. 1071
Smith, J.J., Bull. Jard. Bot. Buitenzorg, Suppl. 2 (1934) t. 91, fig. IV, as Bulbophyllum birugatum J.J.Sm.
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