| Noun | 1. | order Guttiferales - used in some classifications; coextensive with Parietales plant order - the order of plants Dilleniidae, subclass Dilleniidae - a group of families of more or less advanced trees and shrubs and herbs having either polypetalous or gamopetalous corollas and often with ovules attached to the walls of the ovary; contains 69 families including Ericaceae and Cruciferae and Malvaceae; sometimes classified as a superorder |