| Dalea bacchantum Barneby, 1977 |
| Dalea barrancae Jones, 1933 |
| Dalea bechtelii Wiggins, 1965 |
| Dalea benthamii Brandegee, 1889 |
| Dalea berlandieri A. Gray, 1861 |
| Dalea bicolor Humb. & Bonpl. ex Willd., 1809 |
| Dalea bicolor var. argyrea (A. Gray) Barneby, 1977 |
| Dalea bicolor var. bicolor Humb. & Bonpl. ex Willd., 1809 |
| Dalea bicolor var. canescens (M. Martens & Galeotti) Barneby, 1977 |
| Dalea bicolor var. naviculifolia (Hemsl.) Barneby, 1977 |
| Dalea bicolor var. orcuttiana Barneby, 1977 |
| Dalea bigelovii (Rydb.) B.L. Turner, 1950 |
| Dalea blasiana Jones, 1929 |
| Dalea boraginea Barneby, 1977 |
| Dalea botterii (Rydb.) Barneby, 1977 |
| Dalea botterii var. atrocyanea (Rydb.) Barneby, 1977 |
| Dalea botterii var. botterii (Rydb.) Barneby, 1977 |
| Dalea brachystachys A. Gray, 1853 |
| Dalea brandegeei (Rose) Bullock, 1939 |
| Dalea caeciliae Harms, 1923 |