Thalamiflorae

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).

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

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