| Stanfordia californica S. Watson, 1880 |
| Stanleya Nutt., 1818 |
| Stanleya pinnata (Pursh) Britton, 1889 |
| Stanleyella Rydb., 1907 |
| Stenonema Hook., 1862 |
| Streptanthella Rydb., 1917 |
| Streptanthella longirostris (S. Watson) Rydb., 1917 |
| Streptanthus Nutt., 1825 |
| Streptanthus arizonicus S. Watson, 1890 |
| Streptanthus arizonicus var. luteus Kearney & Peebles, 1939 |
| Streptanthus bernardinus (Greene) Parish, 1917 |
| Streptanthus campestris S. Watson, 1890 |
| Streptanthus carinatus C. Wright ex A. Gray, 1853 |
| 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 |