The adult leaves, produced on branches of mature trees, are nearly round, slightly wider than long, 2–8 cm (1–3 in) diameter, with a coarsely toothed margin and a laterally flattened petiole 4–8 cm (2–3 in) long. Where is this species invasive in the US. The American big-tooth aspen (P. grandidentata), up to 18 metres (59 feet), has larger, somewhat rounded, coarse-toothed leaves. If you liked this article, please share. Although alien to North America, an introduced colony of this tree has established itself in the eastern Ozark section of Washington County, Missouri (Steyermark). https://en.wikipedia.org/w/index.php?title=Populus_tremula&oldid=982410815, Creative Commons Attribution-ShareAlike License, This page was last edited on 7 October 2020, at 23:48. Leafminers develop and live within leaves, where they feed on the soft interior tissues. The European aspen (Populus tremula) is one of the world's most widely distributed trees, ranging from the Arctic to northern Africa and stretching from western Europe to Japan, according to the Trees for Life project. Picture showing the leaves on the left are from a branch on a mature tree, the leaf on the right is from a root sprout or "Sucker" from the same tree. The flowers are wind-pollinated catkins produced in early spring before the new leaves appear; they are dioecious, with male and female catkins on different trees. Hybrids with several other aspens have also been bred at forestry research institutes in order to find trees with greater timber production and disease resistance (e.g. The common European aspen (P. tremula) and the American quaking, or trembling, aspen (P. tremuloides) are similar, reaching a height of 27 metres (90 feet). CPN (Certified Plant Nerd)[email protected], College of Agricultural Sciences - Department of Horticulture, USDA Hardiness Zone Maps of the United States, Oregon Master Gardener Training: Identifying Woody Plants. Leaves flutter in even the smallest amount of wind. All aspens display a smooth, gray-green bark, random branching, rich green leaves that turn brilliant yellow in fall, and catkins (male and female on separate trees) that appear before the leaves in spring. Aspens have large round leaves, grow straight and tall, and form large stands in many sections of the areas in which they grow. Aspen is the only transcontinental broadleaf tree growing from Newfoundland to California and Mexico.
In addition, it is used for plywood and different types of flake and particle boards. Aspen is often associated with the Douglas fir timber type and is a pioneer tree after fires and logging. The fluff assists wind dispersal of the seeds when the capsules split open at maturity.
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