| Dalea sericocalyx (Rydb.) Riley, 1923 |
| Dalea sessilis (A. Gray) Tidestr., 1941 |
| Dalea similis Hemsl., 1878 |
| Dalea simulatrix Barneby, 1977 |
| Dalea sousae Barneby, 1980 |
| Dalea spiciformis (Rose) Bullock, 1939 |
| Dalea submontana (Rose) Bullock, 1939 |
| Dalea tehuacana (Rydb.) Bullock, 1939 |
| Dalea tentaculoides Gentry, 1950 |
| Dalea tenuifolia (A. Gray) Shinners, 1949 |
| Dalea tephrosioides Griseb., 1866 |
| Dalea ternata Brandegee, 1909 |
| Dalea thouinii Schrank, 1817 |
| Dalea thyrsiflora A. Gray, 1861 |
| Dalea tinctoria Brandegee, 1889 |
| Dalea tolteca Barneby, 1977 |
| Dalea tomentosa (Cav.) Willd., 1802 |
| Dalea tomentosa var. mota Barneby, 1977 |
| Dalea tomentosa var. psoraleoides (Moric.) Barneby, 1977 |
| Dalea tomentosa var. tomentosa (Cav.) Willd., 1802 |