Trees and shrubs are perennial plants whose stems become woody and last for many years. Trees usually have a single erect stem or trunk which at a certain height branches out to form a crown, whereas shrubs branch from near to, or at, ground level.
Trees and shrubs are also differentiated according to height. Small trees attain, a height of about eight metres, those of the second category fifteen to twenty-four metres, and those of the first category more than twenty-five metres. The thickness of a tree is usually given by the diameter of the trunk measured at breast height, i.e. 1.3 metres above ground.
In other words, tree with buds arranged in spirals has the leaves also arranged in spirals. Buds are protected against drying out and frost damage by modified leaves known as scales; either by just single scale (willow or plane tree), two scales (alder), or several scales (beech, hornbeam and oak). Distinguishing features of the scales are colour and pubescence. Some trees that bloom in early spring can be identified by the flower buds, which are of different shapes, e.g. willow, elm, poplar and cherry.
The trunks of most broad-leaved trees divide at a certain height into a few, thick, upward or outward- growing branches which divide further to form the crown which may be broadly oval to round. This shape provides the leaves with the greatest amount of light and air, thus assuring the best conditions for the nourishment of the tree. The tree is anchored in the ground by means of roots which also serve to supply it with water and mineral nutriments.
Spines and thorns are another good means of identification, e.g. on the twigs of the wild pear, black locust and honey locust. The twigs of other trees have conspicuous lenticels (bird-cherry, white ash), waxy warts (birches) or corky plates (hedge maple and smooth-leaved elm).
Vegetation, and, above all, trees are also important from the aesthetic viewpoint - refreshing both to the eye and spirit. How bleak and depressing a landscape without trees would be; and what a beautifying and softening effect wisely-placed greenery has, as it enhances modern buildings and constructions. That trees and forests are a source of profound aesthetic experience and inspirations is testified to by the works of prominent painters, composers as well as the motifs of popular folk songs. Today all civilized nations are making a concentrated effort to protect and increase greenery in cities and countryside. If we are to do a good job of protecting and propagating trees, however, . we must know more about them, learn their life secrets and their requirements. Equipped with the necessary knowledge about trees and shrubs we will be better able to select species suitable for a given environment, and will be rewarded by their good and healthy growth. - 16035
Trees and shrubs are also differentiated according to height. Small trees attain, a height of about eight metres, those of the second category fifteen to twenty-four metres, and those of the first category more than twenty-five metres. The thickness of a tree is usually given by the diameter of the trunk measured at breast height, i.e. 1.3 metres above ground.
In other words, tree with buds arranged in spirals has the leaves also arranged in spirals. Buds are protected against drying out and frost damage by modified leaves known as scales; either by just single scale (willow or plane tree), two scales (alder), or several scales (beech, hornbeam and oak). Distinguishing features of the scales are colour and pubescence. Some trees that bloom in early spring can be identified by the flower buds, which are of different shapes, e.g. willow, elm, poplar and cherry.
The trunks of most broad-leaved trees divide at a certain height into a few, thick, upward or outward- growing branches which divide further to form the crown which may be broadly oval to round. This shape provides the leaves with the greatest amount of light and air, thus assuring the best conditions for the nourishment of the tree. The tree is anchored in the ground by means of roots which also serve to supply it with water and mineral nutriments.
Spines and thorns are another good means of identification, e.g. on the twigs of the wild pear, black locust and honey locust. The twigs of other trees have conspicuous lenticels (bird-cherry, white ash), waxy warts (birches) or corky plates (hedge maple and smooth-leaved elm).
Vegetation, and, above all, trees are also important from the aesthetic viewpoint - refreshing both to the eye and spirit. How bleak and depressing a landscape without trees would be; and what a beautifying and softening effect wisely-placed greenery has, as it enhances modern buildings and constructions. That trees and forests are a source of profound aesthetic experience and inspirations is testified to by the works of prominent painters, composers as well as the motifs of popular folk songs. Today all civilized nations are making a concentrated effort to protect and increase greenery in cities and countryside. If we are to do a good job of protecting and propagating trees, however, . we must know more about them, learn their life secrets and their requirements. Equipped with the necessary knowledge about trees and shrubs we will be better able to select species suitable for a given environment, and will be rewarded by their good and healthy growth. - 16035
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Garden planning of a garden for children should be designed to convert easily to a decorative layout.
