CONSTANT PHYLLOTAXIS. 91 



accordance with the laws of chance, the side on which it falls, which 



V /, 3 



Fig. 37. — Scheme for constructing a (3 + 6) system by uniform rate of expansion in 

 axis and primordia : the asymmetrical addition of one new member at a time 

 produces a subjective appearance of spirals, or may be regarded as the result 

 of a growth oscillation across the apex. '/ l^U "/ 



clearly indicates the course of the ontogenetic spiral, Right or Left 

 should result in the fact that, given a large number of specimens, 



