36 



THE LEAF. 



Fig. 



Unequally pinnate, Fig. 66, when a pinnate 

 leaf is terminated at the end by an odd leaflet. 

 Ex. Rose. 



Abruptly pinnate, Fig. 67, when the petiole of 

 a winged leaf ends abruptly, that is, without a 

 leaflet, or tendril. Ex. Senna, (Cassia mary- 

 landica.) 



Alternately pinnate, Fig. 68, when the 

 leaves alternate with each other, being 

 placed on opposite sides of the stem. Ex. 

 many running vines. 



Interruptedly pinnate, Fig. 69, when the leaflets 

 are alternately large and small. Ex. Silver weed, 

 (Potentilla imserina.)' 



\&^' 



Fig. 68. 



Fig. 69. 



Fig. 70. 



Bipinnate, Fig. 70, (doubly winged,) 

 when a common petiole bears pin- 

 nate leaves on each of its sides. Ex. 

 Mountain spignell, (Athamantalilan- 

 otis.) (Mimosa arborea.) 



When is a leaf said to be unequally pinnate ? When abruptly pinnate 1 

 When alternately pinnate ? When bipinnate ? 



