• 



1920] 



HA I NING—GNE T UM 



441 



become 



mbryos from 



mbryo. A case of the development of 

 e suspensor is represented by E. One of 

 has developed into a bulky structure with 

 >ward the apex of this tissue, a number of 



unusually large cells. Toward the ape: 



groups of meristematic cells appear which resemble normal 



development 



formation 



A 



B 



C 



D 



£ 



F 



r 



\J 



vuu 



u 



Fig. 



1. 



Diagrams illustrating polyembryony in G. sp. 15 and G. sp. 59: upper 



tubes represent primary suspensors; those below secondary suspensors; H and D 

 represent usual type; B and C represent appearance found in small percentage of seeds; 

 E and F show cases of proliferation of embryos, which are rarely observed. 



small area of fig. 1 w under greater 



tion. 



diagram 



suspensor to form extra ones. In the preparation showing this 

 condition the cells are indistinct, but the branches may be con- 

 sidered as prolonged "buds," such as those shown in E. 



men 



these 



in the tissues of the secondary suspensors. From ^ , 



of cases, outgrowths have been observed which resemble a normal 



