Costus laevis Ruiz & Pav., Fl. Peruv. & Chil. 1: 3. 1798 sec. Espejo-Serna & López-Ferrari 2008
- =Costus giganteus Kuntze, Revis. gen. pl. 2: 687. 1891 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Costus kuntzei K. Schum. in Bot. Jahrb. Syst. 15: 422. 1893 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Costus splendens Donn. Sm. & Türckh. in Bot. Gaz. 33: 260. 1902 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Costus maximus K. Schum., Pflanzenr. IV. 46 (Heft 20): 405. 1904 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Costus weberbaueri Loes. in Notizbl. Bot. Gart. Berlin 10: 712. 1929 syn. sec. Espejo-Serna & López-Ferrari 2008
- =Costus skutchii C.V. Morton in J. Wash. Acad. Sci. 27: 306. 1937 syn. sec. Espejo-Serna & López-Ferrari 2008