1 68 



THE FORAGE AND FIBER CROPS IN AMERICA 



pastures which are suited to it. It is very unevenly distributed 

 in the field and grows very unequally in different seasons. It 

 is never sown alone but in mixtures at the rate of two to six 

 pounds an acre. It constitutes a part of many lawn mixtures. 



III. CRIMSON CLOVER 



184. Relationships. Crimson clover (Tri folium incarnatum 

 L.), also known as scarlet clover and carnation clover, differs 

 from other commonly cultivated clovers in America in that it 

 produces seed within less than a year from seed. Crimson 

 clover is closely related to the smaller wild rabbit foot or stone 

 clover (7". arvense L.), commonly naturalized from Europe 

 throughout the North Atlantic and southern states. 



185. Description. Crimson clover has a strong, branched 

 tap root and numerous secondary branches reaching to a 

 moderate depth. Under greenhouse conditions tubercles are 



found abundantly upon roots when 

 the plant is three to four weeks old. 

 Six to twelve branches or stems one 

 to three feet high arise from the 

 axils of the leaves of the short main 

 stem : they are but little branched 

 and grow quite erect, giving the 

 plant a bushy appearance. The 

 vegetative parts are characterized 

 by their hairy, almost woolly, ap- 

 pearance. The densely flowered 

 cone-like heads are one to one and 

 a half inches in length and three- 



The 



mealy bug (Pseudococcus tnfolii calyx has short and prominent teeth 



FOr ^L^t" 1Z - <">? is W* hairy; the hairs become 

 spiny as the head matures. The 



color of the corolla may be scarlet, flesh-colored, whitish or 

 yellowish, depending on variety. The time of flowering varies 



