108 



lock: STUDIES in im.wt breboino 



Expectation : 75 starchy .■ 25 sugary. 



On any particular plant the starchy grains were all of fche 

 same shape, except that the smaller grains at the apex were 

 rather more rounded than the larger grains towards the middle 

 of the cob. From plant to plant there was some variation in 

 the shape of the grains, but all the starchy grains were 

 intermediate between the Hint and dent types. The sugary 

 grains on the other band were all closely similar in appearance, 

 and resembled the grains of B. S. almost exactly in shape and 

 consistency. 



Expt. 14. — Yellow flint x Black Mexican (plants from F, 

 grains mutually pollinated). 



Expectation: <■"> starchy; 26 sugary, 



\ in the previous case there was never the least cause foi 

 tation in deciding fromite external appearance whether a 



