DICT.TW Dictionary Taiwan

 subclass Hamamelidae
      n : 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 [syn: Hamamelidae]