| Baltimora geminata (Brandegee) Stuessy, 1973 |
| Baltimora ovata Rusby, 1920 |
| Baltimora recta L., 1771 |
| Baltimora recta var. genuina Hassl., 1913 |
| Baltimora recta var. scolospermum (Steetz) Hassl., 1913 |
| Baltimora scolospermum Steetz, 1854 |
| Baltimora trinervata Moench, 1794 |
| Barkleyanthus H. Rob. & Brettell, 1974 |
| Barkleyanthus salicifolius (Kunth) H. Rob. & Brettell, 1974 |
| Barnadesieae D. Don, 1830 |
| Barnadesioideae K. Bremer & R.K. Jansen, 1992 |
| Barrattia A. Gray & Engelm., 1847 |
| Barrattia calva A. Gray & Engl., 1847 |
| Barroetea A. Gray, 1880 |
| Barroetea brevipes B.L. Rob., 1911 |
| Barroetea glutinosa Brandegee, 1908 |
| Barroetea laxiflora Brandegee, 1910 |
| Barroetea pavonii A. Gray, 1882 |
| Barroetea sessilifolia Greenm., 1904 |
| Barroetea setosa A. Gray, 1880 |