ON THE NATURE OF STIPULES 



221 



(.presented stipules they would, as a rule, be in pairs, 

 which is not the case. Moreover, Clos's view could not, 

 of course, apply to the bracts of exstipulate species. 



Fig. 339. Seedling of Species of Psychotria. 

 8, ~tipule. 



Nat. size. 



