| Dahlia tamaulipana J. Reyes, Islas & Art. Castro, 2018 |
| Dahlia tenuicaulis P.D. Sørensen, 1969 |
| Dahlia tenuis B.L. Rob. & Greenm., 1896 |
| Dahlia tubulata P.D. Sørensen, 1980 |
| Dahlia variabilis (Willd.) Desf., 1829 |
| Dahlia variabilis var. excelsa (Benth.) Walp., 1843 |
| Dahlia wixarika Art. Castro, Carr.-Ortiz & Aarón Rodr., 2015 |
| Damnxanthodium Strother, 1987 |
| Damnxanthodium calvum (Greenm.) Strother, 1987 |
| Dasyanthus Bubani, 1900 |
| Dasyanthus conglobatus Bubani, 1900 |
| Davilanthus E.E. Schill. & Panero, 2010 |
| Davilanthus davilae (Panero & Villaseñor) E.E. Schill. & Panero, 2010 |
| Davilanthus hidalgoanus (E.E. Schill. & Panero) E.E. Schill. & Panero, 2010 |
| Davilanthus huajuapanus (Panero & Villaseñor) E.E. Schill. & Panero, 2010 |
| Davilanthus hypargyreus (B.L. Rob. & Greenm.) E.E. Schill. & Panero, 2010 |
| Davilanthus purpusii (Brandegee) E.E. Schill. & Panero, 2010 |
| Davilanthus sericeus (Klatt) E.E. Schill. & Panero, 2010 |
| Davilanthus veracruzanus B.L. Turner, 2011 |
| Decachaeta DC., 1836 |