7-2 



Bulletin 194 



Cottonwood. >ecklaoe Poplar 



(Mich. Trees). 



1. Winter twig, x 1. 



2. Leaf, x i/j. 



3. Staminate flowering branchlet, x i/i> 



4. Staminate fiower, enlarged. 



5. Pistillate catkin, x VL". 



6. Pistillate flov\'er, pnlarged. 



7. Fruit, X i.j. 



