. Bulletin. Natural history; Natural history. 96 Illinois Nati kal Histoky Siuvky Bi catkins terminal on the new growth. Fruit an obscurely ribbed nut in- closed by the much-enlarged, papery scales of the catkins. The slender, zig-zag twigs are round and have small, round, pale pith. There is no terminal bud. but the lateral buds are inclosed in about (> spirally arranged scales. The trunk is covered with scaly bark. This genus, which has four known species, is widely distributed in eastern North America and southern Europe and is found also in Japan. Two species occur in the United
. Bulletin. Natural history; Natural history. 96 Illinois Nati kal Histoky Siuvky Bi catkins terminal on the new growth. Fruit an obscurely ribbed nut in- closed by the much-enlarged, papery scales of the catkins. The slender, zig-zag twigs are round and have small, round, pale pith. There is no terminal bud. but the lateral buds are inclosed in about (> spirally arranged scales. The trunk is covered with scaly bark. This genus, which has four known species, is widely distributed in eastern North America and southern Europe and is found also in Japan. Two species occur in the United States, one of them limited to the high altitudes of the southern Rocky Mountains. OSTRYA VIRGINIANA K. Koch Hop Hornbeam Ironwood The Hop Hornbeam is a small tree, with an open, round-topped crown of slender branches. The alternate, finely double-toothed, sharp-pointed leaves, 3 to 5 inches long by IJ/^ to 2 inches broad, are thin but leathery, dull yellow-green and smooth above and pale-green beneath, with pale hair in the angles of the veins. They have slender, round petioles about ^ of an inch long and rounded or some- what heart-shaped bases. The red- dish-brown, hanging, clustered stami- nate catkins are cylindrical and about 2 inches long, and the pale-green pis- tillate catkins are 3^ to ^ inch long. The fruit is a long-stalked, pendulous, cone-like structure, suggestive of the hop, with stinging hairs at the base of the papery scales, which incloses the pointed, flattened, chestnut-brown nut- lets. The slender, zig-zag twigs, smooth and lustrous at first, become dull and dark reddish-brown. The trunk, w^hich commonly attains a di- ameter of 8 to 15 inches, is covered by a thin grayish bark of narrow, ob- long scales w^hich are loose at the ends. The tree reaches a height of 25 to 40 feet. Distribution: The Hop Horn- beam is a common tree on dry, gravel- ly, and stony soils from Nova Scotia. Fig. 33. Distribution of the Hop Please note that these images are
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