subclass hamamelidae meaning and definition

SUBCLASS HAMAMELIDAE noun

Definition of subclass Hamamelidae (noun)

1. a group of chiefly woody plants considered among the most primitive of angiosperms; perianth poorly developed or lacking; flowers often unisexual and often in catkins and often wind pollinated; contains 23 families including the Betulaceae and Fagaceae (includes the Amentiferae); sometimes classified as a superorder
   • synonyms: Hamamelidae