HOP HORNBEAM. IRON-WOOD. 



Ostrj/a Virginiana, (Mill.) Koch. 



Fig. 131. Branchlet with mature leaves and fruit, i; involucral sacs opened, to show nutlets, and 



detached nutlets, 2 ; branchlets in winter bearing young staminate aments and leaf-buds, 3. 



132, Trunk of tree, in Lewis Co., N. Y. 



133. Wood structure magnified 15 diameters. 



