| Saccoplectus strigosus Oerst., 1858 |
| Salutiaea Colla, 1849 |
| Salutiaea grandiflora (Schiede) Colla, 1849 |
| Sinningia Nees, 1825 |
| Sinningia incarnata (Aubl.) D.L. Denham, 1974 |
| Sinningia richii Clayberg, 1968 |
| Sinningia speciosa Hiern, 1877 |
| Smithiantha Kuntze, 1891 |
| Smithiantha aurantiaca Wiehler, 1995 |
| Smithiantha canarina Wiehler, 1992 |
| Smithiantha cinnabarina (Linden) Kuntze, 1891 |
| Smithiantha fulgida (Ortega ex Van Houtte) Voss, 1895 |
| Smithiantha laui Wiehler, 1992 |
| Smithiantha multiflora (M. Martens & Galeotti) Fritsch, 1894 |
| Smithiantha zebrina (Regel) Kuntze, 1891 |
| Solenophora Benth., 1840 |
| Solenophora calycosa Donn. Sm., 1898 |
| Solenophora chiapasensis D.N. Gibson, 1972 |
| Solenophora coccinea Benth., 1840 |
| Solenophora endlicheriana (C. Heller ex Fenzl) Hanst., 1865 |