38 



THE LEAF 



you perceive any correspondence between the manner of 

 lobing or indentation of their margins, and the direction 

 of the veins ? To what class would you refer each one ? 

 The lobes themselves may be variously cut, as in the 



60. — ■ Pinnately lobed leaf of an oak. 61. — Palmately lobed leaf of grape. 



fennel and rose geranium, thus giving rise to twice-cleft, 

 thrice-cleft, four-cleft, or even still more intricately divided 

 leaves. Where the divisions are very deep it may some- 

 times be a little puzzling to decide whether they are not 



62. — Pinnately divided leaf 

 of a buttercup. 



63. — Palmately parted leaf of tall butter- 

 cups. 



separate leaflets, but if there is the merest thread of green 

 connecting the segments, as in Figures 62 and 63, it is con- 

 sidered a simple lobed leaf. 



45. Compound Leaves. — Compare with the specimens 

 just examined a leaf of horse-chestnut, clover, or Virginia 



