| Agave (Agave) scaposa Gentry, 1982 |
| Agave (Agave) scolymus A. Berger, 1898 |
| Agave (Agave) scolymus Karw. ex Salm-Dyck, 1834 |
| Agave (Agave) scolymus var. polymorpha A. Terracc., 1885 |
| Agave (Agave) scolymus var. seemanniana (Jacobi) A. Terracc., 1885 |
| Agave (Agave) sebastiana Greene, 1885 |
| Agave (Agave) seemanniana Jacobi, 1869 |
| Agave (Agave) seemanniana subsp. pygmaea (Gentry) B. Ullrich, 1992 |
| Agave (Agave) seemanniana var. perscabra Trel., 1915 |
| Agave (Agave) shawii Engelm., 1875 |
| Agave (Agave) shawii subsp. goldmaniana (Trel.) Gentry, 1978 |
| Agave (Agave) shawii subsp. shawii Engelm., 1875 |
| Agave (Agave) shawii var. sebastiana (Greene) Gentry, 1949 |
| Agave (Agave) shrevei Gentry, 1942 |
| Agave (Agave) shrevei subsp. magna Gentry, 1982 |
| Agave (Agave) shrevei subsp. matapensis Gentry, 1972 |
| Agave (Agave) shrevei subsp. shrevei Gentry, 1942 |
| Agave (Agave) sicaefolia Trel., 1915 |
| Agave (Agave) sisalana Perrine, 1875 |
| Agave (Agave) sleviniana I.M. Johnst., 1924 |