1. Rheum (Rhabarber, Zier-Rhabarber)
  2. Rheum alexandrae (Königs-Rhabarber)
  3. Rheum australe (Himalaya-Rhabarber)
  4. Rheum emodi (Himalaya-Rhabarber)
  5. Rheum palmatum (Chinesischer Zier-Rhabarber)
  6. Rheum palmatum var. tanguticum (Kron-Rhabarber, Sibirischer Zier-Rhabarber)
  7. Rheum rhabarbarum (Krauser Rhabarber)
  8. Rheum rhabarbarum 'Holsteiner Blut' (Rhabarber, Speise-Rhabarber)
  9. Rheum undulatum (Krauser Rhabarber)