. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 179. ^ PLATE XCI. AMERICAN MOUNTAIN ASH 1. A lloworiiig branch, with havts, x i. J. section of a llower, enlarged. ."{. A fruiting branch, x J. 4. Section uf a fruit, enlarged. Ti. A winter twig, natural size. t». Sectiou ui a winter twig, enlarged. I AMERICAN MOUNTAIN ASH Pyrus americana, (Marshall) De Candolle FORM—A small tree exceeding 20 ft. In height ^vlth a diameter of 12 inches. A tree 14 Inches in dianrieter is reported from Lycoming county. Trunk rather short and the crown narrow and ro
. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 179. ^ PLATE XCI. AMERICAN MOUNTAIN ASH 1. A lloworiiig branch, with havts, x i. J. section of a llower, enlarged. ."{. A fruiting branch, x J. 4. Section uf a fruit, enlarged. Ti. A winter twig, natural size. t». Sectiou ui a winter twig, enlarged. I AMERICAN MOUNTAIN ASH Pyrus americana, (Marshall) De Candolle FORM—A small tree exceeding 20 ft. In height ^vlth a diameter of 12 inches. A tree 14 Inches in dianrieter is reported from Lycoming county. Trunk rather short and the crown narrow and round-topped, BARK—Thin, smooth or slightly scaly and grayish. TwIGB^Rather stout, smooth, grayish to reddish-brown, covered with conspicuous, pale, oblong lenticels, pith large, brownish. BTTD43—^Alternate, purplish-red, smooth or slightly hairy on outside but densely hairy on inside; terminal bods large, about i of an inch long, broadly conical, with 2-3 visible bud- scales, sharp-pointed and often curved at apex; lateral buds about i of an inch long, closely appressed, somewhat flattened, with 1-2 visible bud-scales. LEAVES—^Alternate, compound, 6-10 inches long, with 13-17 sessile leaflets. Leaflets in pairs except terminal one, lanceolate, 2-3 inches long, sharp-pointed at apex, serrate on margin, tapering or rounded at base. Smooth and dark yellowish-green when full grown, turning yellow in autumn. LEAF-SCARS—Alternate, rather large, elevated on a projection of the twig, broadly U-shaped, with wavy margin, containing 3-8 bundle-scars. FLOWERS—Appear about May when the leaves are fully developed, about i of an inch across, arranged in flat cymes 3-4 inches across. They are white, perfect, FRUIT—Arranged in flat-topped clusters, persisting far into winter, berry-like, about the size of a medium-sized cherry, bright red, round or pear-shaped, In winter wrinkled, its flesh strongly acid. WOOD—Difl'use-porous; rays indistinct; soft, weak, brownish, close-grained
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