70 POME^. [part I. 



which has been successively called Crataegus, 

 Mespilus, and Sorbus. There are several beau- 

 tiful low shrubs belonging to this division of the 

 genus Pyrus. 



The genus Cydonia, the Quince, differs from 

 Pyrus in having its seeds arranged in longi- 

 tudinal rows, instead of being placed side by 

 side. In the Chinese Quince there are thirty 

 seeds in each row, arranged lengthways of the 

 fruit. The ovary of this genus consists of five 

 cells, each containing one row of seeds, the seeds 

 being covered with a kind of mucilaginous pulp. 

 The well-known plant, formerly called Pyrus 

 japonica^ has been removed to the genus 

 Cydonia on account of its ovary and the dis- 

 position of its seeds, which are decidedly those 

 of the Quince. It differs, however, from the 

 common Quince in its seeds, which are arranged 

 in two rows in each cell. 



The common Hawthorn (CratcBgus Oxyacantha) 

 hasgenerally only two styles (see «, Jig. 80) , but the 



number of styles 

 varies in the 

 many different 

 species included 

 in the genus 

 from one to five. 

 The corolla, ca- 



FiG. 30.— Flower and fruit of the lyX, and stamcnS 



Hawthorn. , , 



are the same as 



