THE WHITE POPLAR. 



66] 



green upper surface ol the leaf, which becomes (.hick, opaque, and some- 

 what leathery. 



Late in the season both sides of the blade are sometimes 

 smooth. The leaves of this tree are subject to great variation in shape, 

 but they are usually more pointed and more triangular than the 

 leaves of the Aspen or the Grey Poplar. The margin is generally 

 cut into by sharp toothed lobes : sometimes it is merely jagged or 

 slightly toothed. The leaves ol the suckers have conspicuous lobes, 

 and are larger than the others, measuring as much as four inches 

 against their two to three inches. The leaf-surfaces are not so flat 

 and even as those of Aspen leaves, and they hang less loosely than 

 either these or Black Poplar leaves. The leaf-stalks are flattened like 

 those of other Poplars, but are not so long in proportion to the leaf 

 as on the Aspen. 



PLAN ()!• LEAF 



