List of Dahlia species

There are 42 accepted species of flowering plants in the genus Dahlia, according to The Plant List. The sectional classification of Dahlia  sensu Sørensen (1969) as updated by Saar et al. (2003) and Hansen (2004) and (2008) is as follows (excluding infraspecific taxa);

Unresolved

 * D. pinnata Type (more properly D. × pinnata) Most likely (= D. coccinea × D. sorensenii).
 * D. mixtecana J. Reyes, Islas & Art.Castro (possibly Section Dahlia or Section Entemophyllon)