# 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);

## Section Pseudodendron Sherff

| Scientific Name | Chromosome Count | Distribution |
| D. campanulata Saar, Sørensen, & Hjerting | 2n = 32 | Mexico (Guerrero and Oaxaca) |
| D. excelsa Bentham | 2n = 32 | Mexico |
| D. imperialis Rozel ex Ortgies | 2n = 32 | Mexico, Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, Panama and south into Colombia and Ecuador |
| D. tenuicaulis Sørensen | 2n = 32 | Mexico (Oaxaca, Jalisco, Michoacan) |

## Section Entemophyllon Sørensen

| Scientific Name | Chromosome Count | Distribution |
| D. congestifolia Sørensen | 2n = 34 | Mexico (Hidalgo) |
| D. dissecta S. Watson | 2n = 34 | Mexico (Tamaulipas) |
| D. foeniculifolia Sherff | 2n = 34 | Mexico (Nuevo León, Tamaulipas) |
| D. linearis Sherff | 2n = 34 | Mexico ( Guanajuato, Querétaro) |
| D. rupicola Sørensen | 2n = 34 | Mexico (Durango) |
| D. scapigeroides Sherff | 2n = 34 | Mexico (Guanajuato, Hidalgo, Querétaro) |
| D. sublignosa (Sørensen) Saar & Sørensen | 2n = 34 | Mexico (Tamaulipas) |

## Section Dahlia Sherff

| Subsection | Scientific Name | Chromosome Count | Distribution |
| Subsection Dahlia | D. apiculata (Sherff) Sørensen | 2n = 32 | Mexico (Oaxaca, Puebla ) |
| Subsection Dahlia | D. atropurpurea Sørensen | 2n = 64 | Mexico (Guerrero) |
| Subsection Dahlia | D. australis (Sherff) Sørensen | 2n = 32 or 64 | Mexico (Chiapas, Oaxaca, Michoacan), Guatemala |
| Subsection Dahlia | D. barkeriae Knowles and Westcott | 2n = 64 | Mexico (Jalisco, Michoacán) |
| Subsection Dahlia | D. brevis Sørensen | 2n = 32 | |
| Subsection Dahlia | D. coccinea Cavanilles | 2n = 32 or 64 | Mexico |
| Subsection Dahlia | D. cordifolia (Sessé & Moc.) McVaugh | 2n = 32 | Mexico (Michoacán) |
| Subsection Dahlia | D. cuspidata Saar, Sørensen, & Hjerting | | Mexico (Guerrero ) |
| Subsection Dahlia | D. hintonii Sherff | | Mexico (Guerrero ) |
| Subsection Dahlia | D. hjertingii Hansen and Sørensen | | Mexico (Hidalgo) |
| Subsection Dahlia | D. mollis Sørensen | 2n = 32 | Mexico (Hidalgo, Guanajuato, Querétaro) |
| Subsection Dahlia | D. moorei Sherff | | Mexico (Hidalgo, Querétaro) |
| Subsection Dahlia | D. neglecta Saar | | Mexico Hidalgo, Guanajuato, Querétaro, Veracruz) |
| Subsection Dahlia | D. parvibracteata Saar & Sørensen | | Mexico ( Jalisco) |
| Subsection Dahlia | D. pteropoda Sherff | 2n = 64 | Mexico ( Puebla, Oaxaca) |
| Subsection Dahlia | D. purpusii Brandg. | | Mexico (Chiapas) |
| Subsection Dahlia | D. rudis Sørensen | 2n = 32 | Mexico (Distrito Federal, México, Michoacán) |
| Subsection Dahlia | D. sherffii Sørensen | 2n = 32 or 64 | Mexico (Chihuahua, Durango, Sinaloa, Jalisco) |
| Subsection Dahlia | D. scapigera (A. Dietrich) Knowles & Westcott | 2n = 32 | Mexico (Distrito Federal, Michoacán, Guanajuato, Hidalgo) |
| Subsection Dahlia | D. sorensenii Hansen & Hjerting | 2n = 64 | Mexico (Distrito Federal, Michoacán, Hidalgo) |
| Subsection Dahlia | D. spectabilis Saar, Sørensen, & Hjerting | | Mexico (San Luis PotosÍ) |
| Subsection Dahlia | D. tamaulipana J.Reyes, Islas & Art.Castro | 2n = 32 | Mexico (Tamaulipas) |
| Subsection Dahlia | D. tenuis Robinson & Greenman | 2n = 32 | Mexico (Oaxaca) |
| Subsection Dahlia | D. tubulata Sørensen | 2n = 32 | Mexico (Nuevo León, Tamaulipas, Coahuila) |
| Subsection Dahlia | D. wixarika Art.Castro, Carr.-Ortiz & Aarón Rodr. | | Mexico (Durango, Jalisco) |
| Subsection Merckii Sørensen | D. merckii Lehm. | 2n = 36 | Mexico ( Monterrey, Puebla, Nuevo León, Oaxaca) |

## Section Epiphytum Sherff

| Image | Scientific Name | Chromosome Count | Distribution |
| | D. macdougallii Sherff | 2n = 32 | Mexico (Oaxaca) |

## 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)