66 LIFE ON THE FARM. 



growth develop at the base of the leafstalk. The 

 divisions, or leaflets, of a compound leaf do not, in 

 falling, separate from the main stem, which is, in 

 fact, the midrib; and no buds develop at the bases 

 of the petioles of the leaflets. 



Examples of compound leaves are the walnut, 

 rose, and locust. Some compound leaves have 

 their leaflets compound. These leaves are called 

 doubly compound. Some are even trebly com- 

 pound. Examples of lobed leaves are the oak, 

 maple, and water-melon vine; of toothed leaves, 

 the elm, willow, and peach; of simple leaves, or 

 entire, smooth margins, Indian corn, redbud, and 

 plantain. 



Leaves are built upon a framework of veins. 

 Generally, there is one large vein in the middle of 

 the leaf, called the midvein, and many small 

 veins issue from it, making it resemble a feather. 

 In others there is a network of small veins on 

 each side of the midvein. The veins in many 

 leaves all radiate from one point, which is the 

 point of attachment of the petiole to the blade, pro- 

 viding there is a petiole present. A good example 

 of the last is the common garden nasturtium. 



Compound leaves take their shapes from the 

 style of venation. If the small veins spring out 

 along the midvein, the result is a compound leaf 

 like that of the sumac or tomato; but if they all 

 radiate from one point, the result is a compound 

 leaf like that of the chestnut or clover. 



