86 



V1C1A. 



[CHAP. 



stalk, which becomes several inches long and curves 

 downwards so as generally to force the pod into the 

 ground. If it fails in this, the pod does not develop, 



FIG ^z.Vicia amfihicarpa. 

 a. a, ordinary pods ; b b, subterranean pods. 



but soon perishes ; on the other hand, as soon as it is 

 underground the pod begins to grow and develops two 

 large seeds. 



In Vicia amphicarpa, Fig. 52, a South European 



