QUAKING ASP. TREMBLING POPLAR. POPPLE. 



Pop id us t re undo ides Miclix. 



Fig. 122. Branchlets with mature and young leaves, i ; isolated empty capsules, 2 ; a capsule 

 and its actual contents, procured by confining the capsule at the time of opening, 3 ; branchlet in 

 winter with cluster of flower-buds near tip, 4. 



123. Trunk of tree in Essex Co., N. Y. Note the transition from smooth young bark to 

 rough old bark. 



