DICOTYLEDONOUS PLANTS 



353 



also well known, 

 a great many 



Some authors consider P. satiwtm 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 

 There are 

 cultivated 

 varieties. 



There is considerable 

 difference of opinion as to 

 the origin of the^bean. Many 

 claim that it came from Asia, 

 but others believe that it is a 

 South and Central American plant which was carried to Europe 

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



FIG. 192. Flowers of strawberries. Pistil- 

 late or imperfect at left. Perfect at right. 

 (Productive Farming.) 



FIG. 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. hybridum), the 



