118 ORIGIN AND DESCRIPTION OF WHEAT TYPES 



M 41 I 



FIQ. 48. Grains of spelt wheat group. In threshing, the kernels normally are not free 

 from the chaff as in upper figures. Lower figures are the free kernels. Note that the kernels 

 differ from wheat in being pointed at both ends. Left to right, einkorn, emmer and speltz. 



FIG. 49. An example of selection. Two plots of turkey wheat, each from a single 

 plant. One lodged while the other stood erect. 



Natural Occurrence of New Types. It may then be asked 

 how these new types are to be found in wheat if it does not vary. 

 This is accounted for in two ways: (1) Occasionally a natural cross 



