VII ] 



THE LEAVES. 



In the first place, compare the leaf of an Apple-tree 

 or Daisy with one from the Rose .or Horse Chestnut. 

 You observe that in the two former the leaf is in one 

 piece ; in the two latter the petiole bears several distinct 

 pieces. These distinct pieces are called leaflets, and 

 leaves which are thus divided into distinct leaflets are 

 termed compound. Leaves, on the other hand, which 

 are not divided into separate leaflets, are termed simple. 

 Simple leaves may be very deeply divided, as in Butter- 

 cup, but the divisions do not extend to the base of the 

 blade, nor are they separately jointed to the petiole. 

 The portions of a simple leaf thus divided are called the 

 segments or lobes. 



8. Simple undivided leaves. It will be useful practice 

 to try to find leaves which correspond to the various 

 outlines figured below. It will constantly happen that 



FIG. 42. 



acicular., 



linear, 



oblong. 



oval, 



elliptical 



rotundate 



orbicular 



FIG. 43. 



lanceolate ... . ----------------- / 



subulate 



cordate 



renifo> j/t 



C.B. 



