Scrophulariaceous \Scroph`u*la`ri*a"ceous\, a. (Bot.) Of or pertaining to a very large natural order of gamopetalous plants (Scrophulariace[ae], or Scrophularine[ae]), usually having irregular didynamous flowers and a two-celled pod. The order includes the mullein, foxglove, snapdragon, figwort, painted cup, yellow rattle, and some exotic trees, as the Paulownia.

Source: Webster's Revised Unabridged Dictionary (1913)