130 FAMILIES OF FLOWERING PLANTS 
which are often united into a single genus under the former name. 
Amygdalus, the peach, though not originally a native of our country, 
has become extensively naturalized as an escape from cultivation. 
It will be seen that the Rosaceae and their allies form a well- 
defined natural group, with remarkable regularity in the appearance of 
their flowers (so that the term “rosaceous” is in common use) but with 
great diversity in fruit structure. The reverse is the case in the pea 
family and its allies, which we shall consider later. A remarkable fea- 
ture of the Rosaceae is that the color blue seems to be entirely wanting 
among the flowers of the various genera. 
Family Connaraceae. Connarus Family. This is a connecting 
link between the great groups already discussed and those which will 
follow. It contains about 160 species of tropical climbing shrubs, dis- 
posed in 16 genera, of which Connarus and Rourea are the most import- 
ant. They have flowers of the leguminous type, but the ovary is com- 
posed of several carpels, 
