USEFUL FUNCTIONS OF TREES

Today, we realize that, besides being a source of raw materials, trees are of even greater importance for their role in the regulation of climate, water management, hygiene, health, recreation; and, last but not least, in beautifying the environment. The past century has witnessed a rapid increase in world population, and the progress of science … Read more

Box elder Acer negundo

Aceraceae The Box-elder is a native of North America, where it has a wide range of distribution, extending from California to Florida and northwards to Canada. It was introduced into Europe in 1688, and today is cultivated throughout the entire Continent, tolerating even the climate of northern Europe. In some areas it is well naturalized … Read more

Honey Locust Gleditsia triacanthos L.

Leguminosae The honey locust was named for the botanist Gottlieb Gleditsch and for its three-branched, 5 to 15-centimetre-long spines, which grow on the trunk and branches. It is a native of eastern-North America, where it is found on moist, rich soils from Texas northward to the 43rd parallel. It can tolerate drier situations, and is … Read more

False Acacia or Black Locust Robinia pseudoacacia L.

Leguminosac The false acacia is a native of North America, where it grows in mixed broad-leaved woods from Pennsylvania to Georgia and Oklahoma. It was named after the French botanist Jean Robin, who introduced it into Europe in 1601. Today, it is widespread throughout western, central, eastern and southern Europe and in some areas is … Read more

London Plane Platanus x hispanica (P. x acerifolia WILD.)

Platanaceae The London plane tree is a natural hybrid between the oriental plane (Platanus orientalis L.), and the American plane or buttonwood (Platanus occidentalis L.),and was first recorded about 1663. It is more resistant to frost than the parent trees and thus widespread throughout Europe all the way to the Baltic Sea. It is a … Read more

Wild Cherry or Gean Primus avium L.

Rosaceae For centuries, the wild cherry has been cultivated in gardens and its seeds distributed by birds, so that now it is difficult to determine its original, natural area of distribution. Today, it is found growing in mixed, broad-leaved woods throughout western, central and eastern Europe, in lowland, hilly and sub-alpine areas up to heights … Read more

Whitebeam Sorbus aria

Rosaceae The whitebeam is widespread in southern, central and western Europe, including Great Britain, the southern tip of Sweden marking the northernmost limit of its range. Throughout this area, however, it occurs fairly sparsely. A light-demanding and warmth-loving species, it is often found growing on chalk or limestone hills facing south. In such conditions, it … Read more

Silver Birch Betula pendula ROTH (Syn. B. alba L. and B. verrucosa EHRH.)

Betulaceae The birch is a tree of the northern hemisphere and its several species are distributed throughout Europe, America and Asia. Most common on the Continent is the silver birch growing in the wild from Italy to the Balkan Peninsula, northwards beyond the Arctic Circle and eastwards far into Siberia. In central Europe it is … Read more

Goat Willow or Great Sallow Salix caprea L.

Salicaceae The goat willow is more abundant in forests than any other willow. Its range includes all of Europe and extends far into Asia. It grows from lowland to high mountain elevations and, unlike other willows, is an important pioneer in forests where its seedlings colonize forest clearings and felled areas. The goat willow is … Read more

White Willow Salix alba L.

Salicaceae The white willow is the commonest tree-size willow in Europe, attaining heights of 20 to 25 metres with trunks one metre across and living from 80 to 120 years. Old trees have thick, vertically furrowed, yellow-brown bark. The yellowish flowers, arranged in catkins, appear in April, while those borne on the female trees ripen … Read more

Black and Lombardy Poplars Populus nigra L.

Salicaceae The black poplar’s natural range of distribution embraces the whole of western, central and eastern Europe, extending into Siberia as far as the Yenisei River. It grows in moist soils, often alongside large rivers, mainly on sand and gravel formations. It is a large tree, attaining a height of 35 metres, with a widespreading … Read more

Aspen Populus tremula L.

Salicaceae The aspen is a forest tree, occurring widely throughout the whole of Europe, and extending beyond the Arctic Circle in the north. In central Europe it grows in lowland and on mountains up to and above 1000 metres; it is most plentiful, however, in hill country, coppice forests and forests which are clear-felled. It … Read more