COMPOUND LEAVES. 



29 



ply pinnate, having several leaflets 

 arranged along both sides of the com- 

 mon stalk. This common stalk, an- 

 swering to the mid vein of a simple 

 leaf, is called the rachis. 



37. Among pinnate leaves, there 

 are, at least, three important distinc- 

 tions. Observe the Figs. 59, 60, and 

 61. One of them ends with an odd 

 leaflet, and is called odd-pinnate. 

 Another ends with a pair of leaflets, 

 and is equally pinnate. Another still 

 has its alternate leaflets smaller, and is interruptedly pinnate, 



Fig. 58. Leaf of the Rose. 



Fig. 59. Odd-pinnate leaf ( Tephrosia). Fig. 61. Interruptedly pinnate (Agrimony;. 

 Fi-ff. 60. Equally pinnate leaf ( Cassia). Fig. 62. Pinnately ternate (Desmodium). 

 Fig. 63. Pulmately ternate (Clover). 



36. Define the pinnate leaf. What is the rachis ? 



37. Give the distinction between odd-pinnate and equally pinnate. What 

 leaf is interruDtfdly pinnate ? 



