ROSACEOUS PLANTS. 09 



54. Raspberry. Calyx, corolla, and stamens have 

 ilie same arrangement as in Strawberry, and the pistil is 

 likewise apocarpous, the numerous carpels covering the 

 surface of a raised receptacle. But here the carpels do not 

 produce achenes. Each of them at jnaturity forms a frait 

 resembling a drupe, so that the raspberry is a mass of 

 drupes heaped upon a common receptacle, 



55. ' Let us now sum up our observations upon the repre- 

 sentatives of the great Order of Kosaceous plants. We 

 have found them to possess the following characters in 

 common: 



1. The petals and the numerous stamens are inserted on 



the calyx {perigynous). 



2. The pistil, except in the Apple, is apocarpous and 



free from the calyx. 



3. It may he added that the leaves are furnished with 



stipules. 



56. The diiferences (which lead to the sub-division of 

 llie Order into subordinate groups) are chiefly in the fruit, 

 111 Sweet Brier, with which may be compared any wild 

 Ebso, the achenes are enclosed in the calyx-tube. In Straw- 

 berry the receptacle is conical ; so also in Raspberiry, In 

 the Cherry the carpel is single, forming a drupe. In the 

 Apple the ovary is syncarpous and combined with the 

 fleshy calyx. Compare with the Apple the Hawthorn and 

 the Mountain Ash or 'Rowan Tree. 



57. The following are the schedules descriptive of 

 .Vveet Brier and Crab- Apple. Those relating to Cherry, 

 Strawberry, and Raapbeny should be carefully filled up 

 by the pupiL 



