| Berchtoldia holciformis (Kunth) E. Fourn., 1886 |
| Berchtoldia junciformis Hemsl., 1895 |
| Berchtoldia oplismenoides E. Fourn., 1886 |
| Biatherium Desv., 1831 |
| Bicknelliana Hitchc. & Chase, 1910 |
| Bifaria (Hack.) Kuntze, 1898 |
| Blepharidachne Hack., 1887 |
| Blepharidachne bigelovii (S. Watson) Hack., 1889 |
| Blepharochloa Endl., 1840 |
| Blepharoneuron Nash, 1898 |
| Blepharoneuron shepherdii (Vasey) P.M. Peterson & Annable, 1990 |
| Blepharoneuron tricholepis (Torr.) Nash, 1898 |
| Blumenbachia Koeler, 1802 |
| Blumenbachia halepensis (L.) Koeler, 1802 |
| Blumenbachia micrantha G. Don, 1834 |
| Blyttia Fr., 1839 |
| Boivinellinae Pilg., 1940 |
| Bonia Balansa, 1890 |
| Boriskellera Terechov, 1938 |
| Botelua Lag., 1805 |