100 



ZMSSOIfS WITS PLANTS 



but the petiole (or rachis) extends beyond the 

 pair of leaflets, as may be seen by the joint 



Fig. 97. 

 Leaf of orange. 



in the petiolule of the terminal leaflet. The leaf, 

 then, is evidently pinnate; and if homology will 



aid in the inter- 

 pretation, the pupil 

 will be interested 

 in examining the 

 leaves of peas, 

 ground-nut or apios, 

 and other relatives. 

 111. An orange 

 leaf is shown in 

 Fig. 97. There is 

 a large blade, a 

 winged petiole, a, 

 Pio. 98. and a distinct joint 



The compound-leaved orange. Or articulation be- 



