| Bradburya schottii Millsp., 1898 |
| Bradburya unifoliata Rose, 1903 |
| Bradburya virginiana (L.) Kuntze, 1891 |
| Brasilettia (DC.) Kuntze, 1891 |
| Brasilettia glabra Britton & Rose, 1930 |
| Brasilettia pringlei Britton & Rose, 1930 |
| Brasilettia violacea (Mill.) Britton & Rose, 1930 |
| Breviflorae Krukoff, 1974 |
| Brittonamra Kuntze, 1891 |
| Brittonamra caribaea (Jacq.) Kuntze, 1891 |
| Brittonamra caribaea var. edwardsii (A. Gray) Kuntze, 1891 |
| Brittonamra sericea (A. Gray) Kearney, 1894 |
| Brongniarteae Hutch., 1964 |
| Brongniartia Kunth, 1824 |
| Brongniartia abbottiae I.M. Johnst., 1938 |
| Brongniartia alamosana Rydb., 1923 |
| Brongniartia alvarezii Cruz Durán, Bustam. & Dorado, 2022 |
| Brongniartia angustata Rydb., 1923 |
| Brongniartia argentea Rydb., 1923 |
| Brongniartia argyrophylla McVaugh, 1987 |