Magnoliopsida
       n : comprising seed plants that produce an embryo with paired
           cotyledons and net-veined leaves; divided into six (not
           always well distinguished) subclasses (or superorders):
           Magnoliidae and Hamamelidae (considered primitive);
           Caryophyllidae (an early and distinctive offshoot); and
           three more or less advanced groups: Dilleniidae; Rosidae;
           Asteridae [syn: Dicotyledones, class Dicotyledones, Dicotyledonae,
            class Dicotyledonae, class Magnoliopsida]