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 $i. 



5. Flowering branchlet, x y 2 . 



6. Staminate flower, enlarged. 

 /. Pistillate flower, enlarged 



8. Fruit, x ^. 



9. Achene, enlarged. 



140 



