~~ 
404 THE JOURNAL OF BOTANY 
&e.—have arisen from certain indifferent primordia at the vege- 
which nothing can be identified ; each is the result of a hypothetical 
transformation of the abstract ‘leaf,’ according to the need of the 
plant. 
The doctrine which he condemns could never have been developed 
if the less variable root, and not the protean leaf, had been the 
dy 
eration. .... 
If we separate function from form, we are at once led into altogether 
unfruitful speculations.” 
These 
‘General differentiation of the plant-body”; they are followed by 
e second section, ‘ Relationships of Symmetry ”’ (pp. 65-138), 
deals with ‘‘ the general relationships in space of the configuration 
** zygomorphic. uch work remains to be done on the causes of 
dorsiventrality of flowers and inflorescences; the fact that examples 
