74 SYSTEMATIC POMOIX)GY. 



R. invisus, Bailey. — Parent of Bartel and other cultivated 

 Dewberries; has somewhat ascending round stems, and leaflets 

 which are coarsely and always simply toothed. 



APPLES AND PEARS. 

 GEWTJS PTETJS. 



(Classical name of the Pear.) 



The genus is a very important one comprising the apple and 

 the pear. These have in common cartilaginous, parchment- 

 like, thin-walled cells that contain the seeds. The fruit which 

 is known as a pome consists of a hollow receptacle in which 

 the ovary is imbedded. The edible part of an apple is, there- 

 fore, the receptacle while the core is the ovary. The species 

 are small trees having hard tough wood and bearing clusters of 

 white or reddish flowers with the leaves or in advance of them. 



THE PEAK. 



Leaves simple; flowers in a simple corymb or cluster; fruit 

 generally with its iase tapering down to the sialic; and the 

 flesh bearing grit cells; styles usually not united at the base. 

 Leaves smooth and shining. Trees usually pyramidal in 

 shape and very long-lived often growing 200 years. Pears 

 have been greatly improved in recent years and the number of 

 varieties increased from- a few to over 1,000. 



There is no satisfactory classificatory system for pears in 

 American pomology. Not much has been done toward classify- 

 ing pears in our country, chiefly because the fruit has received 

 comparatively little attention since its great popularity in the 



