- Papilla (plural: Papillae) : Papilla refers to the structure on the surface of the tongue which contains taste buds. Papillae which is the plural form of Papilla are bumps on which lie from one to several hundred taste buds consisting of between 50 to 150 taste receptor cells; rRidges and valleys on the tongue, some of which contain taste buds. There are four (4) types of Papillae: filiform, fungiform, foliate, and circumvallate.