56 



POTENTILLE^, OR 



[part I. 



The calyx is persistent, that is, it remains on 

 till the fruit is ripe. 



The Raspberry {Ruhns IdcBus) differs widely 

 from the strawberry in many particulars, not- 

 withstanding their being included not only in the 



same natural 

 order, but in 

 the same tribe. 

 The ca-lyx has 

 only five se- 

 pals {a in fi- 

 gure 23) ; and 

 though the co- 

 rolla has five 

 petals (^), they 

 do not form 

 a cup-shaped 

 flower. In the 

 centre are the 

 carpels, the 



Fig. 23.— Flowers and fruit op the Raspberry. fu„^y> ^f wliipli 



is shown of the natural size at c, and magnified 

 at d^ the latter showing that each has a 

 separate style and stigma. As the raspberry 

 advances, the petals drop, and the receptacle 

 becomes elevated into what is called a torus, 

 as shown of the natural size at e ; bearing 

 the carpels upon it, which gradually swell out 

 and soften, till each becomes a little pulpy fruit, 



