Thalamiflorae is a historical grouping of dicotyledons, arranged in the De Candolle system and in the Bentham and Hooker system. This group was named and published well before internationally accepted rules for botanical nomenclature. In these systems, a family was indicated as "ordo", and modern rules of botanical nomenclature accept that as meaning a family rather than an order. [Article 18.2] Family names have also since been standardized (most family names now end in -aceae).

Previous group

Polypetalae. Dome shaped plants with unexpanded flower receptacle (thalamus), polysepalous, hypogynous with a superior ovary

Thalamiflorae detailed view of subclass

Within the dicotyledons ("classis prima Dicotyledoneae") the systems recognize this as subclass 1. Thalamiflorae. The full Ordo, Tribe and genera are shown below Ordo 1. Ranunculaceae Ordo 2. Dilleniaceae Ordo 3. Magnoliaceae Ordo 4. Annonaceae Ordo 5. Menispermaceae Ordo 6. Berberideae Ordo 7. Podophyllaceae Ordo 8. Nymphaeaceae Ordo 9. Papaveraceae Ordo 10. Fumariaceae Ordo 11. Cruciferae Ordo 12. Capparideae Ordo 13. Flacourtianeae Ordo 14. Bixineae Ordo 15. Cistineae Ordo 16. Violarieae Ordo 17. Droseraceae Ordo 18. Polygaleae Ordo 19. Tremandreae Ordo 20. Pittosporeae Ordo 21. Frankeniaceae Ordo 22. Caryophylleae Ordo 23. Lineae Ordo 24. Malvaceae Ordo 25. Bombaceae Ordo 26. Byttneriaceae Ordo 27. Tiliaceae Ordo 28. Elaeocarpeae Ordo 29. Chlenaceae Ordo 30. Ternstroemiaceae Ordo 31. Camellieae Ordo 32. Olacineae Ordo 33. Aurantiaceae Ordo 34. Hypericineae Ordo 35. Guttiferae Ordo 36. Marcgraviaceae Ordo 37. Hippocrateaceae Ordo 38. Erythroxyleae Ordo 39. Malpighiaceae Ordo 40. Acerineae Ordo 41. Hippocastaneae Ordo 42. Rhizoboleae Ordo 43. Sapindaceae Ordo 44. Meliaceae Ordo 45. Ampelideae Ordo 46. Geraniaceae Ordo 47. Tropaeoleae Ordo 48. Balsamineae Ordo 49. Oxalideae Ordo 50. Zygophylleae Ordo 51. Rutaceae Ordo 52. Simarubeae Ordo 53. Ochnaceae Ordo 54. Coriarieae