Plate 1 a. Costus afer Ker Gawler. Flower. – b. Costus aureus Maas & H.Maas. Inflorescence. – c. Costus albiflos Maas & H.Maas. Inflorescence. – d. Costus dinklagei K in Monograph of African Costaceae

Plate 1 a. Costus afer Ker Gawler. Flower. – b. Costus aureus Maas & H.Maas. Inflorescence. – c. Costus albiflos Maas & H.Maas. Inflorescence. – d. Costus dinklagei K.Schum. Habit and details. – e. Paracostus englerianus (K.Schum) C.D.Specht. Habit with flower. – f. Costus ligularis Baker. Inflorescence (a: Maas et al. 10023; b: photographed in Ghana, no specimen collected; c: Maas et al. 10411; d: N. Hallé 4129, drawing in his collecting book; e: photographed in Botanical gardens Utrecht, no specimen collected; f: Maas et al. 9794). — Photos: a, c, f: P.J.M.Maas; b: T.R.van Andel; d: C.D.Specht; e: L.Y.T.Westra.