=a.= HYPOGYNOUS flowers (with a few exceptions): 29, _Tubifloræ_; 30,
_Personatæ_; 31, _Nuculiferæ_; 32, _Contortæ_.
=b.= EPIGYNOUS flowers: 33, _Rubiales_; 34, _Dipsacales_; 35,
_Campanulinæ_; 36, _Aggregatæ_. The ovaries and ovules in the last
family are always reduced to one; and at the same time the fruits
become nuts, and the flowers are united into crowded inflorescences.
A. Pentacyclicæ.