Costaceae is a pantropical family that contains about 100 species, divided into 7 genera: Monocostus (1 sp.), Dimerocostus (2 spp.), Tapeinochilos (16 spp.), Paracostus (2 spp.), Chamaecostus (~8 spp.), Cheilocostus (~4 spp.), Costus (~8 spp.). Flowers are often showy (sometimes the bracts are showier) and are arranged in a terminal head (except for Monocostus with only one flower per inflorescence). Infertile stamens are fused to form an labellum which serves to attract pollinators. The plants contain no aromatic oils.