ASYMMETRICAL AND SYMMETRICAL PHYLLOTAXIS. 



81 



Fig. 36.— Verbascum Thapsus, L. Transverse section of the apex of a perennating 

 shoot: system (3 + 5). Theourvedrawn through empiricalcentralpointsoftheleaf 

 sections approximates the true curve of unifonn growth very closely (cam. lucid. 



