Contains 69 families including Ericaceae and Cruciferae and Malvaceae

• Sometimes classified as a superorder
• 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

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Dicotyledonae \Dicotyledonae\ n. (Bot.) a class of plants comprising those seed plants that produce an embryo with two cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae ...

Wikipedia Word definitions in Wikipedia
Dillenidae is a botanical name at the rank of subclass . Circumscription of the subclass will vary with the taxonomic system being used; the only requirement being that it includes the family Dilleniaceae . A well-known system that uses this name is the ...