EVOLUTION, HOMOPLASY, ANALOGY, HOMOLOGY 349 



stipules, and these from the pinnules, or branches of higher order. It 

 will then be seen that the axis bears to the rachis a like relation to that 



Fig. 260. 

 Pinnate leaf ot Robima, after Figuier. 



Fig. 261. 

 Doubly pinnate leaf of Gleditschia, after Figuier. 



which the rachis bears to the pinnae, and, in doubly pinnate leaves, the 

 pinnae to the pinnules (Figs. 260, 261). The construction of the whole 



