192 RELATION OF PHYLLOTAXIS TO MECHANICAL LAWS. 



majority of the members are cut, and the original construction 

 does not necessarily follow from such a section. Taking the rise 

 from (2+4) to (10 + 16) as the expression of the addition of 20 



Fig. 75. — Oephalaria tartarica, Schrad. Section of tenninal capitulum 6/10/16 

 type, numbered throughout. 



new curves, the system should be complete at about twenty-six 

 members, and this is possibly the case, but the proof is not definite : 



