ROSIFLOR^E. 



463 



firm (the " core "). The nature of the fruit varies, according to 

 the thickness and hardness of the endocarp, being either a " berry" 

 or a "drupe" (see A and ). When the endocarp is thin and 

 parchment-like, the fruit has the characteristics of a berry, each 

 of the 5 loculi generally present containing several seeds ; but when 

 this is hard the fruit resembles a drupe, only one seed is developed 

 in each loculus, and the number of the loculi is reduced to one or 

 two. There are nearly always 2 ovules in the loculi of the ovary, 

 but in Cydnnia there are a large number in 2 rows. In the genera 



PIG. 505. Floral diagram 

 of Msspilus germanic i. 



FIG. 501. Longitudinal ami transverse section through the flowers of A, B Colvneaster ; 

 CCydonia; D Malus communis ; E Rapliiolepis ; F Cydonia; G 3fesj>tlus. 



which have stones, only one seed is developed in each stone. The 

 genera are distinguished mainly in accordance with the kind of 

 fruit and the number of ovules and seeds. 



A. SORBET. THE ENDOCARI J is PAKCHMEXT-LIKK OR PAPERY (drupe, 

 with thin stone or berrv). 



1. Pyrus and Cydonia; carpels completely embedded in the 

 cup-like receptacle, styles always free. Pi/rus : the fruit is 

 glabrous, and has only a small calyx, withering or deciduous, 

 and a 5-locular ovary with at most 2 ascending ovules in each 



