STRUCTURE OF SEEDS 



183 



Make a drawing of the whole bean showing these 

 parts, and of the single cotyledon with the caulicle and 

 plumule in place. 



2. Study of the Grain of Corn 



Soak a few grains of corn in hot water for twenty 

 minutes or use grains that have soaked in water over 

 night. With a sharp knife remove the tip cap at the 

 end of the kernel. Beginning at the end where the 



FIG. 51. KERNELS OF CORN IN SECTIONS SHOWING THE GEBM 



hull has been broken at the tip cap, remove the hull from 

 the entire grain in strips. The part immediately under 

 the hull is called the horny gluten. Carefully remove 

 it by shaving it off with a sharp knife. Now remove the 

 germ or embryo. Make out the caulicle and plumule 

 as you did in the Lima bean. After the tip cap, hull, 



