The filiform papillae are the most numerous lingual papillae and are characterized by their slender, conical shape. Unlike fungiform, circumvallate, and foliate papillae, filiform papillae lack taste buds and primarily serve a mechanical function by providing texture and aiding in the manipulation of food. This absence of taste buds makes them non-gustatory, a critical point for clinical identification during oral examinations and surgeries involving the tongue. Understanding the distribution of taste buds is essential in preserving gustatory function during surgical procedures.

Reference: Gray's Anatomy, Standring S., 42nd Edition.