The names Agave gustaviana J.N.Haage & E.Schmidt and A. maximiliana Baker (Asparagaceae / Agavaceae) are typified in preparation of the conservation of A. maximiliana against A. gustaviana. For this purpose a specimen, “Agave maximiliana Hort. Kew Feb. 22^nd 1881 N.E. Brown s.n.” (K000543880) kept at K is designated as neotype. Since Baker (1877), when he published the name A. maximiliana, cited the earlier A. gustaviana as a synonym of the former, both A. gustaviana and A. maximiliana have the same type. The name A. gustaviana was published in 1874, i.e., three years before A. maximiliana, and will have to be adopted for this economically important species, unless the conservation proposal is successful.