Bulbophyllum crabro (E.C.Parish & Rchb.f.) J.J.Verm., Schuit. & de Vogel is recorded from Sumatra, which is the first record of this species from Indonesia. This is also the first record of Bulbophyllum section Monomeria (Lindl.) J.J.Verm., Schuit. & de Vogel outside continental Asia. A detailed description, a map, discussion, and colour photographs are provided.