| Digitariinae Butzin, 1972 |
| Digitariopsis C.E. Hubb., 1940 |
| Digraphis Trin., 1820 |
| Digraphis americana Elliott ex Loudon, 1830 |
| Digraphis arundinacea (L.) Trin., 1820 |
| Dilepyrum Michx., 1803 |
| Dilepyrum diffusum P. Beauv., 1812 |
| Dilepyrum minutiflorum Michx., 1803 |
| Dileucaden (Raf.) Steud., 1841 |
| Dimeiostemon Raf., 1825 |
| Dimeiostemon macrurus Raf. ex B.D. Jacks., 1895 |
| Dimeiostemon tetrastachys Raf. ex B.D. Jacks., 1893 |
| Dimeiostemon vaginatus Raf. ex B.D. Jacks., 1893 |
| Dimesia Raf., 1817 |
| Dimorphostachys E. Fourn., 1875 |
| Dimorphostachys adoperiens E. Fourn., 1886 |
| Dimorphostachys botterii E. Fourn., 1886 |
| Dimorphostachys ciliifera Nash, 1903 |
| Dimorphostachys drummondii E. Fourn., 1886 |
| Dimorphostachys ghiesbreghtii E. Fourn., 1886 |