RISING PHYLLOTAXIS. 



125 



plant so far as it goes, and well within the range of the Variation 

 Curves. Again, in the system (3+5), (8 + 13), (21 + 34), the 



Fig, 49. — Seedling of Helianthus annuus, (2 + 3) system above decussating leaves : 

 transition to a higher series after asymmetrical production of 13 members. 



members along the long curves differ by 3, 8, or 21 respectively, 

 and since in dorsiventral constructions the long curves are more 



