Hornbeam - Carpinus betulus скачать в хорошем качестве

Hornbeam - Carpinus betulus

Hornbeams are relatively small hardwood trees in the genus Carpinus, family Betulaceae, and birch subfamily Coryloideae. The 30–40 species occur across much of the north temperate regions, with the greatest number of species in east Asia, particularly China. Only two species occur in Europe, only one in eastern North America, and one in Mesoamerica. Carpinus betulus (European or common hornbeam) is native to Eurasia, extending to southern England. It is a small to medium-size tree, rarely reaching heights of 30 m (98 ft). The trunk is often fluted and crooked. The bark is smooth and greenish-grey, even when old. Compare to Betula pendula, the European (silver) birch on right of panel towards end of video. The buds, unlike those of the beech, are short, and pressed close to the twig. The leaves are alternate, with prominent veins giving a distinctive corrugated texture, and a serrated margin. Carpinus betulus is monoecious, and the wind-pollinated male and female catkins appear in early summer after the leaves. The fruit is a small nut, partially surrounded by a three-pointed leafy involucre (bract), and matures in autumn. The seeds often do not germinate till the spring of the second year after sowing. The hornbeam is a prolific seeder and is marked by vigorous natural regeneration. Carpinus betulus is a shade-loving tree, which prefers a warm climate, moderate soil fertility and moisture. It has a shallow, wide-spreading root system and is marked by the production of stump sprouts when cut back. The wood is heavy and hard, and is used for tools and building constructions. It also burns hot and slowly, making it a very suitable firewood. This was the reason for lopping and hence indirectly the saving of Epping Forest, where the hornbeam was a favoured pollarding tree. http://en.wikipedia.org/wiki/Carpinus... http://en.wikipedia.org/wiki/Hornbeam