The botanical directory
From familiar garden flowers to species you have yet to meet. Explore the flowering plant tree through accepted scientific names, botanical families, and synonyms.
- Accepted species
- 347,476
- Synonym names
- 710,971
- Botanical families
- 430
- Genera
- 13,895
Find a flower. Follow its family.
Search scientific names or try a familiar florist name, like rose or peony.
Scientific names and synonyms are searchable from two characters. Familiar florist names link to their broader genus; common names are not available for every species.
44 species · RheumShowing 1–24
Clear filtersPhotos show the identified species; cultivars and commercial forms can vary. Related genus guides cover other plants in the same group. Name authors credit the botanists behind a scientific name; “L.” stands for Carl Linnaeus. Swipe across the table to see family and guide links.
| Photo | Species | Family & genus | Flower guides |
|---|---|---|---|
| No photo yet | Rheum acuminatumName author: Hook.f. & ThomsonAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum alexandraeName author: BatalinAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum altaicumName author: Losinsk.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum australeName author: D.DonAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum compactumName author: Carl Linnaeus (L.)Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum delavayiName author: Franch.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum forrestiiName author: DielsAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum glabricauleName author: Sam.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum globulosumName author: GageAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum hotaoenseName author: C.Y.Cheng & T.C.KaoAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum inopinatumName author: PrainAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum kialenseName author: Franch.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum laciniatumName author: PrainAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum lhasaenseName author: A.J.Li & P.K.HsiaoAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum likiangenseName author: Sam.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum lucidumName author: Losinsk.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum macrocarpumName author: Losinsk.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum maculatumName author: C.Y.Cheng & T.C.KaoAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum moorcroftianumName author: RoyleAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum nanumName author: Siev. ex Pall.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum nobileName author: Hook.f. & ThomsonAccepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum officinaleName author: Baill.Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum palmatumName author: Carl Linnaeus (L.)Accepted species | PolygonaceaeRheum genus | No guide yet |
| No photo yet | Rheum przewalskyiName author: Losinsk.Accepted species | PolygonaceaeRheum genus | No guide yet |
A living reference.
A documented starting point.
Taxonomy changes as plants are studied. This directory preserves the accepted names and synonym relationships in a specific World Flora Online release, so you can trace every entry to its source.
View the June 2026 source datasetWhat is included?
All 347,476 accepted species classified under Angiosperms in this snapshot, plus 710,971 names treated as synonyms of those species. Flowering trees, grasses, and other less familiar flowering plants belong here too.
Is this every flower that has ever existed?
No complete list of every historical or undiscovered species exists. This collection excludes unresolved names, subspecies and varieties as separate records, non-flowering plants, and most cultivated forms. It is not a complete fossil or cultivar register.
Can I order these flowers?
A botanical record does not establish cut-flower availability or suitability for an arrangement. Our 980 florist guides cover commercial flowers, specialty garden cuts, and foliage, with design notes, photos, and calculator links. Calculator selection uses that florist collection; other ingredients can be entered as custom items.
Taxonomy: World Flora Online Consortium · CC0 public domain · Published June 21, 2026. Photographs and editorial florist guides have separate credits.