PLATE XLVIII. AMERICAN HOP HORNBEAM. 



1. Flowering branch with immature leaves, (s) staminate flowers, (p) pistillate flowers, x h 



2. Branch with mature leaves and hop-like fruit clusters, x i. 



3. A seed with inclosing membrane, slightly enlarged. 



4. A seed with part of inclosing membrane removed, slightly enlarged. 



5. A winter branch with partly developed terminal staminate aments, x i. 



6. Section of winter twig, enlarged. 



