HARRIS AND AVERY: MORPHOLOGICAL VARIATIONS 115 



lot feasible to reduce these frequencies for the individual classes 

 o a percentage basis for comparisons. This has, however, been 

 lone for larger groups secured by combining all the seedlings 



TABLE VI 



NUMBER OF LEAFLETS PRODUCED AT THE THIRD NODE BY SEEDLINGS OF VARIOUS 



TYPES 



I 



howing merely separation of the cotyledons and all those showing 

 hree cotyledons instead of the normal two. The results are shown 

 n the accompanying TABLE VII, which is self explanatory. 



TABLE VII 



COMPARISON OF THE NUMBER OF LEAFLETS IN DICOTYLEDONOUS AND TRICOTYLEDO- 

 NOUS SEEDLINGS WITH THAT IN THEIR NORMAL CONTROLS 



A comparison may be made without the combination of dif- 

 erent grades of abnormality by grouping the number of leaflets 



