Feb., I92I] HARRIS AND OTHERS — SEEDLINGS OF PHASEOLUS 
93 
4. Central Region of Epicotyl. The frequency distributions of the 
number of bundles occurring in the mid-region of the epicotyl appear in 
table 15 for both the abnormal and the control plants. These distributions 
I ' 1 1 1 i 1 1 1 1 1 1 1 1 1 1 1 1 1 I III ! 
Fig. 21. Percentage frequency distribution of number of bundles in central region of 
epicotyl. 
reduced to a percentage basis are represented graphically in figure 21 for 
line 75, in figure 22 for line 98, and in figure 23 for line 143. The distributions 
