Sycamore. Button-wood. Buttonball-tree 



1. .Winter twig, x I. 



2. Portion of twig, side view, x I. 



3. Vertical section of twig, summer 



bud and leaf petiole, enlarged. 



4. Leaf, x H. 



5. Flowering branchlet, x T A. 



6. Staminate flower, enlarged. 



7. Pistillate flower, enlarged, 



8. Fruit, x 2i 



9. Adrene, enlarged. 



140 



