Every accepted species in the genus is listed. A name links to its page when we hold at least three commercially licensed photographs of it. Where we do not, the row shows how many we actually found, which is usually none.
| Species | Authority | Usable photographs | Page |
|---|---|---|---|
| Dahlia coccinea | Cav. | 297 | documented |
| Dahlia imperialis | Roezl ex Ortgies | 191 | documented |
| Dahlia merckii | Lehm. | 26 | documented |
| Dahlia pinnata | Cav. | 20 | documented |
| Dahlia sorensenii | H.V.Hansen & Hjert. | 16 | documented |
| Dahlia sherffii | P.D.Sørensen | 13 | documented |
| Dahlia campanulata | Saar, Sorenson & Hjert. | 12 | documented |
| Dahlia tenuicaulis | P.D.Sørensen | 10 | documented |
| Dahlia australis | (Sherff) P.D.Sørensen | 9 | documented |
| Dahlia atropurpurea | P.D.Sørensen | 4 | documented |
| Dahlia tubulata | P.D.Sørensen | 4 | documented |
| Dahlia pugana | Aarón Rodr. & Art.Castro | 3 | documented |
| Dahlia hintonii | Sherff | 2 | below the evidence gate |
| Dahlia pteropoda | Sherff | 1 | below the evidence gate |
| Dahlia apiculata | (Sherff) P.D.Sørensen | 0 | below the evidence gate |
| Dahlia brevis | P.D.Sørensen | 0 | below the evidence gate |
| Dahlia calzadana | Villaseñor & Redonda-Mart. | 0 | below the evidence gate |
| Dahlia cardiophylla | S.F.Blake & Sherff | 0 | below the evidence gate |
| Dahlia congestifolia | P.D.Sørensen | 0 | below the evidence gate |
| Dahlia cordifolia | (Sessé & Moc.) McVaugh | 0 | below the evidence gate |
| Dahlia crocea | (Willd.) Poir. | 0 | below the evidence gate |
| Dahlia cuspidata | Saar, Sorenson & Hjert. | 0 | below the evidence gate |
| Dahlia dissecta | S.Watson | 0 | below the evidence gate |
| Dahlia excelsa | Benth. | 0 | below the evidence gate |
| Dahlia foeniculifolia | Sherff | 0 | below the evidence gate |
| Dahlia hjertingii | H.V.Hansen & P.D.Sørensen | 0 | below the evidence gate |
| Dahlia linearis | Sherff | 0 | below the evidence gate |
| Dahlia macdougallii | Sherff | 0 | below the evidence gate |
| Dahlia mixtecana | J.Reyes, Islas & Art.Castro | 0 | below the evidence gate |
| Dahlia mollis | P.D.Sørensen | 0 | below the evidence gate |
| Dahlia moorei | Sherff | 0 | below the evidence gate |
| Dahlia neglecta | Saar | 0 | below the evidence gate |
| Dahlia parvibracteata | Saar & P.D.Sørensen | 0 | below the evidence gate |
| Dahlia purpusii | Brandegee | 0 | below the evidence gate |
| Dahlia rudis | P.D.Sørensen | 0 | below the evidence gate |
| Dahlia rupicola | P.D.Sørensen | 0 | below the evidence gate |
| Dahlia scapigera | Knowles & Westc. | 0 | below the evidence gate |
| Dahlia scapigeroides | Sherff | 0 | below the evidence gate |
| Dahlia spectabilis | Saar & P.D.Sørensen | 0 | below the evidence gate |
| Dahlia tenuis | B.L.Rob. & Greenm. | 0 | below the evidence gate |
This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species needs at least three usable photographs before we will build it a page, because a page with one picture and no traits tells you nothing you could not get from a search result, and generating hundreds of thousands of those is precisely the practice that got the previous version of this site deleted.
So the species above without a link are not errors and they are not omissions. They are real, accepted plants that we cannot yet document to the standard we hold ourselves to, and the count in the photographs column is exactly how far short we fall.