94 AMERICAN JOURNAL OF BOTANY [Vol. 8 
'12 13 14 IS le 11 18 19 20 21 
Fig. 22. Percentage frequency distribution of number of bundles in central region of 
epicotyl. 
for line 93 are essentially the same as those for line 75. The graph for line 
139 is in essential agreement with that for line 98 and is not drawn. 
In the dimerous plants the difference between the form of the frequency 
distributions for number of epicotyledonary bundles in lines 75 and 93 on 
