272 TREES OF MINNESOTA. 
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Plate 25. Populus alba. White Poplar. 
1. Flowering branch from staminate tree, one-half natural 
Flowering branch from pistillate tree, one-half natural size. 3. 
staminate catkin, enlarged. 4. Scale of pistillate catkin, enlarged. 5. Sum- 
mer branch, one-half natural size. 6. Fruiting branch, one-half natural 
size. 7. Wintcr branchlet, one-half natural size. 8. Seedling. 
