COTTONWOODS. 



195 



Plate 24. Populus deltoides. Cotton-wood. 



1. Flowering branch of staminate tree, one-half natural size. 2. Flowering- 

 branch of pistillate tree, one-half natural size. 3. Scale of staminate catkin, en- 

 larged. 4. Scale of pistillate catkin, enlarged. 5. Cross section of ovary, en- 

 larged. C. Fruiting branch, one-half natural size. 7. Mature fruit. 8. Seed 

 enlarged. 



