150 



THE FIRST BOOK OF BOTANY. 



As the number of your observations increases, and 

 their character varies, you will see more and more 

 the value of your notes recording them. 



To the question of this exercise, Parts of Embryo ? 

 you give the answers, as before, from direct observa- 

 tion of the structure of the embryo itself. If some 

 seeds give uncertain appearances, wait till growth 

 has proceeded a little further before you decide about 

 them. By premature judgments you may fill your 

 note-book with errors which you will be compelled to 

 erase. 



EXERCISE LYII. 

 Monocotyledons and Dicotyledons. 



FIG. 259. 



FIG. 260. 



Cotyledon. 



Cotyledon. 



Cotyledon. 



A MONOCOTYLED'ONOUS embryo has one cotyledon 

 or seed-leaf (Fig. 259). 



