COTTONWOOD 



1. Winter twig:, x 1. 



2. Leaf, x y 2 . 



3 Staminate flowering; branchlet, x V 2 . 



4. Staminate flower, enlarged. 



5. Pistillate catkin, x %. 



6. Pistillate flower, enlarged. 



7. Fruit, x y 2 . 



(From Otis: Mich. Trees) 



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