Tig. 15. Stages in the devel(ipiuent 

 of the bean pod 



A, pistil of a bean flower, showing the 

 ovary (o), style (sty), a,nd stigma (sti) ; 

 also the calyx at the base of the pistil. 



B, a pistil a few days older, in which 

 the ovary has grown, and from which 

 the style and stigma have disappeared. 



C, a pistil which has grown into the 

 ripe bean pod. D, a ripe pod opened 

 so as to show the arrangement of the 

 seeds (beans) ui the pod ; each seed («) 

 is attached to a region along the wall 

 of till' ovHvy, knowTi as llii' placenta 

 ipl), by iiicMiis of the base of the old 



ovule. All two thirds natural size 



Fii:. 16. Seedling of the puanut 



Below the seed leaves or cotyledons (e) is 

 the hypocotyl (h) , from the lower end of 

 which the roots (r) have grown ; from the 

 main stem (s) briuichcs (br) and leaves (0 

 have fjriiwii ; at the biise of the leaves are 

 stipules {st), and at the tip is the bud (6) 

 22 



