Betula pendula

Betula pendula, the silver birch, is a species of tree in the family Betulaceae It is native to Europe, Morocco, temperate Asia, Canada, and Alaska, although in southern Europe and Morocco it is only found at higher elevations. Its range extends into Siberia, China, and southwest Asia in the mountains of northern Turkey, the Caucasus, and northern Iran. It has also been called warty birch from the warty twigs, and (particularly for selected strongly pendulous cultivars) weeping birch; in Korea it has been cited as East Asian white birch, though this can also refer to Betula platyphylla. It has been introduced into North America, where it is sometimes known as European white birch, and is considered invasive in some states in the United States and parts of Canada. The silver birch is a medium-sized deciduous tree that owes its common name to the white peeling bark on the trunk. The twigs are slender and often pendulous and the leaves are roughly triangular with doubly serrate margins and turn yellow and brown in autumn before they fall. The flowers are catkins and the light, winged seeds get widely scattered by the wind. The silver birch is a hardy tree, a pioneer species, and one of the first trees to appear on bare or fire-swept land. Many species of birds and animals are found in birch woodland, the tree supports a wide range of insects and the light shade it casts allows shrubby and other plants to grow beneath its canopy. It is planted as a decorative tree in parks and gardens, and is used for forest products such as joinery timber, plywood, firewood, tanning, racecourse jumps, and brooms. Various parts of the tree are used in traditional medicine and the bark contains triterpenes, which have been shown to have medicinal properties.