SEEDS 



0-' 

 kernel will separate from the seed-coats, and the k \ 



thread-like connection may be seen. 



3. Examine and sketch the kernel of the seed, removed : 



whole, noting : 



4. The two thick halves, the cotyledons or seed- leaves, and 



5. The single median structure, the caulicle, 



6. Determine (in another Bean if necessary) whether the 



caulicle lies on the hilum side of the Bean or not, and V 

 whether its free end points toward the micropyle or 

 not. 



IV. Separate the cotyledons carefully along the side 

 opposite to the caulicle, lay one of them over on its side 

 and sketch the parts in this position, noting : 



1. The two cotyledons, their shape, thickness, and consist- 



ency. 



2. The small projection (auricle) upon the inner side of 



each, beside the groove into which the caulicle fits. 



3. The caulicle, its shape, consistency, and attachment to 



each cotyledon. 



4. The small bud or plumule, showing two folded leaves on 



the outside, and lying upon the inner face of one of 

 the cotyledons. 



5. Notice carefully the veins of these two outer leaves of the 



plumule and also the character of the margins. How 

 do they lie, relatively to one another ? 



V. It i? to be noticed that the cotyledons, the caulicle, 

 and the plumule are all joined together into one structure, 

 which is called the embryo, or the part which is to grow into 

 a new plant when the seed sprouts. We may represent the 

 relations of the different parts we have learned about, as 

 follows: 



