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 |
|---|---|---|---|
| Rheum tataricum | L.f. | 135 | documented |
| Rheum rhabarbarum | L. | 92 | documented |
| Rheum compactum | L. | 38 | documented |
| Rheum webbianum | Royle | 6 | documented |
| Rheum nanum | Siev. ex Pall. | 5 | documented |
| Rheum turkestanicum | Janischew. | 5 | documented |
| Rheum alexandrae | Batalin | 4 | documented |
| Rheum australe | D.Don | 4 | documented |
| Rheum tibeticum | Maxim. ex Hook.f. | 2 | below the evidence gate |
| Rheum palmatum | L. | 1 | below the evidence gate |
| Rheum × hybridum | Murray | 0 | below the evidence gate |
| Rheum acuminatum | Hook.f. & Thomson | 0 | below the evidence gate |
| Rheum altaicum | Losinsk. | 0 | below the evidence gate |
| Rheum delavayi | Franch. | 0 | below the evidence gate |
| Rheum forrestii | Diels | 0 | below the evidence gate |
| Rheum glabricaule | Sam. | 0 | below the evidence gate |
| Rheum globulosum | Gage | 0 | below the evidence gate |
| Rheum hotaoense | C.Y.Cheng & T.C.Kao | 0 | below the evidence gate |
| Rheum inopinatum | Prain | 0 | below the evidence gate |
| Rheum kialense | Franch. | 0 | below the evidence gate |
| Rheum laciniatum | Prain | 0 | below the evidence gate |
| Rheum lhasaense | A.J.Li & P.K.Hsiao | 0 | below the evidence gate |
| Rheum likiangense | Sam. | 0 | below the evidence gate |
| Rheum lucidum | Losinsk. | 0 | below the evidence gate |
| Rheum macrocarpum | Losinsk. | 0 | below the evidence gate |
| Rheum maculatum | C.Y.Cheng & T.C.Kao | 0 | below the evidence gate |
| Rheum moorcroftianum | Royle | 0 | below the evidence gate |
| Rheum nobile | Hook.f. & Thomson | 0 | below the evidence gate |
| Rheum officinale | Baill. | 0 | below the evidence gate |
| Rheum przewalskyi | Losinsk. | 0 | below the evidence gate |
| Rheum pumilum | Maxim. | 0 | below the evidence gate |
| Rheum racemiferum | Maxim. | 0 | below the evidence gate |
| Rheum reticulatum | Losinsk. | 0 | below the evidence gate |
| Rheum rhaponticum | L. | 0 | below the evidence gate |
| Rheum rhizostachyum | Schrenk | 0 | below the evidence gate |
| Rheum rhomboideum | Losinsk. | 0 | below the evidence gate |
| Rheum ribes | L. | 0 | below the evidence gate |
| Rheum spiciforme | Royle | 0 | below the evidence gate |
| Rheum subacaule | Sam. | 0 | below the evidence gate |
| Rheum sublanceolatum | C.Y.Cheng & T.C.Kao | 0 | below the evidence gate |
| Rheum tanguticum | Maxim. ex Balf. | 0 | below the evidence gate |
| Rheum uninerve | Maxim. | 0 | below the evidence gate |
| Rheum wittrockii | Lundstrom | 0 | below the evidence gate |
| Rheum yunnanense | Sam. | 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.