THE DEVELOPMENT OF THE OVULE INTO A SEED 45 



B 



FIG. 54. A, a vertical section through an Oat ovary showing one style 

 and stigma, the ovary wall, and the parts of the ovule. B, a vertical section 

 through an Oat kernel showing its parts. After comparing with Figure 53 

 label the parts of A and B and with lines indicate the parts of A from which 

 the parts of B have developed. 



A 



B 



FIG. 55. A diagram showing the relation of the parts of the ovule to 

 those of the seed in Red Clover. A, ovule just after fertilization showing 

 the egg (e) and the endosperm nucleus (d). B, seed with half of the seed 

 coat (s) removed to show the large embryo (em}. The dotted lines indicate 

 the relation of the parts of the ovule to those of the seed. 



