DICOTYLEDONOUS PLANTS 



353 



Some authors, consider P. sativum to be a variety of the P- 

 arvense, but this is doubted by others. 



The common bean (Phaseolus vulgaris) and the lima bean 

 (P. lunatis) (Fig. 195) are 



also well known, 

 great many 



There are 



cultivated 



a 

 varieties. 



There is considerable 

 difference of opinion as to 

 the origin of the: bean., Many 

 claim that it cam& from Asia, 

 but others believe that it is a 

 South and Central American plant which wasi carried to Europe 

 by the Spaniards at a very early date (Tig. 196). 



Fig. 192. — Flowers of Btrawberriee. PistU- 

 late or imperfect at left. Perfect at right. 

 (Productive Farming.) 



Fie. 193. — Small fruit production. 



The clovers which are used so extensively as forage crops: 

 belong to this family. Among the most important are the white 

 clover {Trifolium repens), the alsike clover (T. hylridum), the 



