MOW A ri.ANl OI/JS (JUT Ol' THK SV.KD. 



23 



the primary root becomes very long, containing few rootlets. The 

 primary root is not straight, but bent first in one direction then in 

 another. Fig. 2<S. If these seedlings are placed on moist sand, the 

 top bends toward the ground and soon forces its way into the loose 

 sand. Examine young corn ]:)lants two or three weeks old and 

 you may be able to make out the first joint above the ground. 

 P^ig. 29. If you will watch th( ]^rogress of these you can see small 



rootlets coming from 

 this joint. A corn 

 plant early begins to 

 form its air roots. These 

 roots are directed to- 

 wards the earth. When 

 they strike it, small root 

 hairs and small rootlets 

 are formed. 



Figure 29. 



Figure 30. 



Germinatinor corn. Nutritious material in ?eed ex- 

 " '' nodal roots. 



Peanut in process of germ 

 nation. /' plumule; ""' cot\l- 

 dons. 



