64 



MORPHOLOGY, OR COMPARATIVE ANATOMY. 



there is only one pair of lateral leaflets and a terminal one, but in these 

 the petiole is ordinarily developed between the pair of leaflets and the 



Fig. 106. 



Fig. 107. 



Pig. 106. A. pinnately decompound leaf. 

 Fig. 107. A pedate leaf. 



Fig. 108. A ternate leaf with obcordate 



leaflets. 



end one. What are called Alternate (fig. 109) and triternate compound 

 leaves are in most cases pinnate leaves with unijugate and terminal 

 leaflets. Such leaves should perhaps be called ternato -pinnate or biternato* 

 pinnate, &c. 



A modified form, apparently intermediate between pinnate and. palmate 

 leaves, like some ternate leaves, occurs through the suppression of the main 

 rachis of the bipinnate leaves of some Acacias, giving what may be 

 called a palmipinnate form (fig. 110). 



Fig. 109. 



Fig. 110. 



A biternate leaf. 



A palmipinnate leaf. 



