Costus bicolor J.Braun & K.Schum. (1889) 152. —

Type: Braun 91 (holo B destroyed), Cameroon, ‘in Múha, bei Mal- imba auf dicken Baümen in Inundationsgebiet des Sannaga flusses’. This epiphytic species is insufficiently understood because the type (and only material) in B has been destroyed