52 



THE WHEAT (JULTTJEIST. 



Dot enough nourishment in it to form a stem to reach 

 the surface of the ground. When this is the case, both 



roots and stem 

 cease to grow, 

 and die before 

 the young 

 plant had 

 come up. In 

 five days after 

 the kernel was 

 planted, the 

 first leaf ap- 

 p e a r e d. In 

 two days more 

 the leaves 

 were develop- 

 ed as here rep- 

 resented. The 

 joint at A, in- 

 sures the for- 

 mation of a 

 system of sec- 

 ondary roots, 

 the office of 

 which is to 

 take up nour- 

 ishment for 

 the gi'owth 

 and fructifica- 

 tion of the plant. At this point also the tillering of the 

 plant takes place, and not where the primary roots unite 

 with the stem at the base. The stem of this plant is 

 represented as having been doubled. 



Fig. 9. — A young wheat plant from a kernel planted deep. 



