PEA FAMILY 



199 



oides) is used extensively for shade and the Japanese species 

 are used extensively for ornamental purposes. 



A very excellent grade of sugar is made from the sap of 

 the sugar maple and its manufacture forms a very important 

 industry in some parts of the country, especially in the New 

 England States and the northern states farther west. In the 

 early history of the country, this was the most important and 

 in many cases the only source of sugar for the early settlers. 



FIG. 124. Maple. 



Most species are grown from seeds sown one or two inches 

 deep. The seeds of the early ripening species will not*retain 

 their vitality until the following spring and, therefore, should 

 be sown as soon as possible after they fall from the tree. They 

 can also be grown from layers and by grafting. Some fancy 

 species and varieties are always propagated in this manner. 



PEA FAMILY 



This family includes herbs, shrubs, trees and vines; leaves 

 alternate and usually odd-pinnately compound, with stipules; 



