. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1917. Populus grandidentata (X M). relatively small, vol glutinons^ Aspens and White Poplars. AA. Terminal hiids often pnhescent, B. Mature Ivs. nsiially green, greenish or brown be- neath. 8. tr^mula, Linn. European Aspen. Fig. Open headed, light-leaved tree, becoming 50-60 ft. tall: Ivs. small and thin
. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches. Gardening. 1917. Populus grandidentata (X M). relatively small, vol glutinons^ Aspens and White Poplars. AA. Terminal hiids often pnhescent, B. Mature Ivs. nsiially green, greenish or brown be- neath. 8. tr^mula, Linn. European Aspen. Fig. Open headed, light-leaved tree, becoming 50-60 ft. tall: Ivs. small and thin, round-oval, more or less whitened beneath when young, bordered with deep and rounded incurved teeth; the leaf-stalks long, slender and flat- tened, giving a restless motion to the foliage: leaf-buds small. Widely distributed in Europe and Asia, in this country known chiefly in its weeping form {)i- ditla). —The weeping form of the European Aspen is perhaps the best weeping tree amongst the Poplars. The spray is light, airy and fountain-like, quite unlike the more common weeping forms of our native Popalna grandidentata, which present a stift', angular form, a combination that is rarely pleasing. A characteristic feature of this tree is the profusion of its very long catkins that appear in earliest spring, even before our native Poplars are in bloom. The staminate or male catkins are particularly pleasing, and planters should select that sex, if possible. 9. tremuloides, Michx. (P. Atheniinsis and Grhca, Hort.). American Aspen. Figs. 1906, 1916. Very like P. tremula, but the Ivs. are usually less circular and more abruptly acuminate, the margins are small-crenate rather than deeply toothed, and the Ivs. are green on the under side. Generally distributed in North America north of Pennsylvania and Kentucky, and extending to Mexico in the mountains. 9:487. —One of the first trees to spring up in clearings. The bark of the young trees is whitish gray, rendering the
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