COTYLEDONS, ETC. 



[CH. 



there is the erect Stein, ascending into the light and air, 

 and bearing, thirdly, the first leaves which the baby plant 

 possesses, and which are peculiar in many respects, but 



Fig. 1. A. An embryo jjlantlet dissected from the seed, r radicle, 

 or primary root ; c cotyledons ; 2^ plumule. B. The same after further 

 growth into a seedling, r and c as before ; B the terminal bud ; b buds 

 in axil of cotyledons. All between b and B is the young shoot developed 

 from the plumule. The first internode above b is termed the epicotyl. 



especially in that they accompanied the seedling while it 

 was still wrapped up and tucked away inside the seed. 

 They are consequently termed seed-leaves, or, since a more 

 general term applicable to all cases has advantages. Coty- 

 ledons. Between the cotyledons, and tucked up closely 

 in their embrace during the early stages of its life in the 

 seed, there appears a fourth structure, the primary bud of 

 the seed : this bud consists of the end of the up-growing 

 stem, closely invested by a number of still minute and 

 closely packed organs, which will eventually grow out into 

 leaves. This primary bud of the seedling was termed 



