112 HARRIS AND AVERY: MORPHOLOGICAL VARIATIONS 



and personal equation may influence in some degree the classifi 

 tion of the seedlings. 



The second is a division of the axis into two coordinate branc 

 each with a terminal bud. 



The frequencies of the two types of axial variation are too sni 

 to justify detailed discussion. The entries in TABLE I show t 



TABLE I 



FREQUENCIES OF ABNORMALITY OF SECOND INTERNODE IN NORMAL AND ABXOR.-, 



SEEDLINGS 



in every instance in which any individuals at all are available hi 

 seedlings which are abnormal in either the cotyledonary orb 

 primordial node show a higher percentage of abnormality info 

 structure of the internode beyond the second node than dot* 

 normal controls. 



We now turn to a consideration of variation in the leave n 

 serted at the third node. The leaves of plants with abnorm t] 

 of the axis should not be combined with those having normal ;3 

 They are not sufficiently numerous for separate consideration 



Confining our attention to seedlings which have a normal 1 ^ 

 for at least the length of the second internode of the epicoty w 



