56 



THE FRUIT. 



mass. Ex. currant, whortleberry. The orange and lemon an- 

 swer tliis definition, and are therefore berries. 



FIG. 18. — Forms of fruit ; 13, naked achenia of Fragaria on the surface of the enlarged, 

 fleshy receptacle ; 14, drupaceous achenia of a Rubus on a fleshy, deciduous receptacle ; 15, 

 samara of Acer ; 16, pyxis of Hyoscyamus; 17, pome of Pyrus (pear); 18, berry of Ribes 

 (gooseberry) ; 19, section of the same enlarged ; 20, strobile of Pinus ; 21, cYemocarp of the 

 UmbelliferiSe, as Conium. 



a. This definition cannot include the strawberry, which consists of an en- 

 larged, fleshy receptacle, bearing numerous achenia upon its surface. Nor does 

 it include the blackberry, which, like the other species of the Rubus, is an aggre- 

 gate fruit composed of united drupes. These fruits are called Etseria, by Mirbel. 

 (Fig. 18; 13, 14.) 



15. Strobile (cone). Tliis is an aggregate fruit, consisting 

 of scale-like cai-pels spread open, ^vith naked seeds on their 

 inner side, at base. Such is the fruit of the fir tribe, which is 

 on tlris account called ConifersD. 



