| Dahlia neglecta Saar, 2002 |
| Dahlia parvibracteata Saar & P.D. Sørensen, 2000 |
| Dahlia pinnata Cav., 1791 |
| Dahlia pteropoda Sherff, 1947 |
| Dahlia pubescens S. Watson, 1892 |
| Dahlia pugana Aarón Rodr. & Art. Castro, 2012 |
| Dahlia purpusii Brandegee, 1914 |
| Dahlia rudis P.D. Sørensen, 1969 |
| Dahlia rupicola P.D. Sørensen, 1969 |
| Dahlia scapigera (A. Dietr.) Knowles & Westc., 1840 |
| Dahlia scapigera f. australis Sherff, 1947 |
| Dahlia scapigera f. purpurea Sherff, 1947 |
| Dahlia scapigera f. scapigera (A. Dietr.) Knowles & Westc., 1840 |
| Dahlia scapigera f. serratior Sherff, 1947 |
| Dahlia scapigera f. typica Sherff, 1947 |
| Dahlia scapigera var. arsenei Sherff, 1946 |
| Dahlia scapigera var. australis Sherff, 1947 |
| Dahlia scapigera var. liebmannii Sherff, 1947 |
| Dahlia scapigera var. scapigera (A. Dietr.) Knowles & Westc., 1840 |
| Dahlia scapigera var. typica Sherff, 1947 |