Cribb*, P.J. & Pollard*, B.J. (2004). Bulbophyllum kupense P.J.Cribb & B.J.Pollard, an unusual new orchid from western Cameroon. Kew Bulletin 59 (1): 137-139.
* denotes Kew authors
Monocots III: Orchids
Wet Tropics: Africa
