GERMINATION. 5 



5. If we now refer again to the seed- 

 leaves or cotyledons which exist in every seed, 

 we have to note that the embryos of some seeds 

 have two cotyledons, as in the case of the bean 

 while the embryos of other seeds have only one. 

 Maize may be taken as an example of the 

 latter class. In some cases it is an easy matter 

 to ascertain whether one or two cotyledons 

 are present in the seed, while in others 

 it is matter of some difficulty. It is found 

 that the presence of either one cotyledon, or of 

 two cotyledons is associated with other 

 constant characters of plant structure to which 

 fuller reference will be made later. Seeds 

 with embryos having one cotyledon are describ- 

 ed as mono-cotyledonom, while those in which 

 two cotyledons are present are known as 

 dicotyledonous. 



GERMINATION. 



1. When a gardener or planter sows 

 seeds he takes care to proceed in such a man- 

 ner in preparing the soil and placing the seeds 

 in it, as previous experience has shown him 

 will produce the best results. It is well then 

 that we should learn what takes place during 

 germination, in order that we may know what 

 conditions are essential to success. 



2. If on alternate days a few seeds of 



