uly, 1921] 



THE SEEDLING OF PHASEOLUS VULGARIS 



355 



16 



15 



/3 



12 



-c.. 



HYPOCO TYL 



DIAGRAM 7. Regression of number of bundles in central region of epicotyl on number 

 of bundles in central region of hypocotyl. Empirical means represented by solid dots for 

 dimerous seedlings and by circles for trimerous seedlings. 



