Fig. y-i. Uroatl-Lfuwl 'I'n-rs n\ illi Simple, Alteniatf, Toolh-Edgea Leaves 

 A beech; B, chestnut; C, birch: the little cones fall to pieces when ripe; D, 

 ' poplar: the frnit borne on catkins. {A, C, and D from Britton and Brown s 

 ''Illustrate.1 Flora of the Unite.l States and Canada." B from Schwartz 



" Forstliche Botanik ") 



24u 



