412 BOTANICAL GAZETTE [may 



grain 



included 



lighter than the other two. 



Class R'" indicated dark red (or purple ?). In the original count 

 these grains had been included with the red, but the intensity of 

 color was such that it demanded close scrutiny to distinguish 



the Durnle. Four ears came from this class. Of these, 



from 



one gave 0:130:33, and the other three 0:200:0 (no exact count 

 was made of large homogeneous ears). The first was evidently 

 a 0:3:1, with an excess of red grains, while the others obviously 

 represented the ppRRCC genotype, the conclusions suggested being 

 similar to that of class R". 



Class P indicated faint purple, with the same significance as 

 R for faint red. This class gave three ears, as follows: 



Faint purple Faint red Colorless 



5 4 2I 



S3 36 141 



51 14 x 4i 



No attempt is made at present to attach any significance 



un trust- 



so faint 



much 



single light purple or light red was p 



faint color of the parents was regul 



Class P' indicated light purple, \ 



and 



others 27 : 9 : 28 ratios. 



Class P" indicated dark purple, and gave one ear, 79 : 34 : 85 

 probably a 27 :g: 28 ratio with an excess of red. 



The general conclusion from the preceding is that genotypes 

 may be distinguished, to a degree, on the basis of color intensity 

 at least among red grains. One rather familiar with the material 



most 



y if he discarded intermediates, wfc 

 Returning now to the faint grains 



grains, properly colored, in 



inhibitor tends to lessen materially the intensity 



