BRANCHED LEAVES 



39 



creeper, etc., and one of rose, black locust, vetch, or other 

 pinnate leaf. Notice that each of 

 these last is made up of entirely 

 separate divisions or leaflets, thus 





64. — Pinnately compound 

 leaf of black locust. 



65. — Palmately compound leaf of horse- 

 chesmut. 



forming a compound leaf. Notice also that the two kinds 

 of compound leaves correspond to the two kinds of vein- 

 ing and lobing, so that we have palmately and pinnately 

 compound ones. In pinnate leaves the continuation of 

 the common petiole along which the leaflets are ranged 

 is called the Rhachis. 



46. Trifoliolate Leaves. — In a trifoliolate leaf, or one 

 of three parts, it is often difficult for a beginner to decide 

 whether the divisions are palmate or pinnate. To settle 

 this question, compare a leaf of lucerne, beggar's ticks, or 



66. — Pinnately trifoliolate leaf of a 

 desmodium. 



67.- 



- Palmately trifoliolate leaf of 

 wood sorrel. 



bush clover {Lespedesa), with one of wood sorrel {Oxalis), 

 or any common clover, and observe the mode of attach- 

 ment of the terminal leaflet. When the common petiole 

 is prolonged ever so little beyond the insertion of the 



