148 THE FIKST BOOK OF BOTANY. 



RAD'ICLE. The lower, or root-end, of the embryo. 

 PLU'MULE. The first the terminal bud the up- 

 per end of the embryo. 



GERMINA'TION. The beginning of growth in a seed. 



Read the names of the parts of the embryo given 

 in Figs. 255 and 256. Look at the definitions of these 

 Words. Compare your specimen with the figures, and 

 point out its Cotyledons ; its Eadicle ; its Plumule. 

 Handle your embryo with care, for it breaks easily. 

 Has its radicle begun to put forth roots ? 



Take from your box a vigorous seed of Indian 



FIG. 257. 



Plumule. 



corn in which the roots have begun to grow, and 

 compare it with Fig. 257. 



Separate the embryo and albumen, and, if it has 

 grown as much as the one pictured above, you may 

 easily find the cotyledon, the plumule, and the radicle. 



When you are sure that you have found the radi- 



