The morphology and vasculature of the floral disc have been studied in 30 species of Lamiaceae to discuss its phylogeny. In Lamiaceae the disc receives vascular supply mostly from the gynoecial bundles which indicates its association with the gynoecium. Further, the evolution of both the external form and vasculature of the floral disc progressed independently. On a comparative basis the disc in prostantheroideae and scutellarioideae can be looked upon as most primitive, whilst in ocimoideae as highly evolved.