| Streptanthus carinatus subsp. arizonicus (S. Watson) Kruckeb., Rodman & Worth., 1982 |
| Streptanthus carinatus subsp. carinatus C. Wright ex A. Gray, 1853 |
| Streptanthus coulteri (S. Watson) Greene, 1891 |
| Streptanthus hallii (Payson) Jeps., 1936 |
| Streptanthus heterophyllus Nutt., 1838 |
| Streptanthus linearifolius A. Gray, 1907 |
| Streptanthus longifolius Benth., 1839 |
| Streptanthus longirostris (S. Watson) S. Watson, 1890 |
| Streptanthus micranthus A. Gray, 1849 |
| Streptanthus platycarpus A. Gray, 1853 |
| Streptanthus simulans (Payson) Jeps., 1924 |
| Streptanthus validus (Greene) Cory, 1936 |
| Stroganowia Kar. & Kir., 1841 |
| Strophades Boiss., 1842 |
| Stubendorffia Schrenk, 1844 |
| Stylocarpum Noulet, 1837 |
| Stylonema (DC.) Kuntze, 1891 |
| Synthlipsis A. Gray, 1849 |
| Synthlipsis berlandieri A. Gray, 1858 |
| Synthlipsis densiflora Rollins, 1959 |