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.
The black poplar is a tree of riverine forests and requires abundant light and a high level of underground water for good growth. In commercial forests it is today being replaced by the Carolina poplar (Populus canadensis Moench.), a hybrid between the black poplar and the northern cottonwood (P. deltoides). It is distinguished by rapid growth and is cultivated in plantations. The black poplar produces abundant stump suckers and is also propagated by cuttings. The pyramidal form Populus nigra italica (syn. pyramidalis), the Lombardy poplar, is widely planted in parks and alongside highways. The light wood is used to make plywood and cellulose.
The seeds are carried vast distances, thus making this a pioneer tree in clearings, pastures and fallow land. It also propagates well by root suckers. The wood is light, splits easily and is used to make matches, roof shingles and cellulose.
The twigs are yellow-brown to brown, the buds covered with a layer of balsam resin. The flowers and fruit are very much like those of the white poplar. The balsam poplar is a light-demanding tree that requires considerable moisture.
The juniper is a dioecious species, i.e. individual trees bear only male, or only female flowers. Inconspicuous, they are borne in the axils of the needles, maturing after two years into blue-black berry-like cones.
The white poplar grows in regions with a mild climate. It requires abundant light and ample moisture, and stands up well to flood water and slightly acidic soils. It is very attractive as an open- grown tree in water meadows, and, because of its vast root system, is used also to strengthen sand dunes. In intensive forest management it is being replaced by cultivated forms of black poplars. The wood is soft, and used to make cellulose and for turnery. The pyramidal form from Turkestan, known as Populus alba pyramidalis (syn. bolleana), often makes its appearance in parks. - 15266
The black poplar is a tree of riverine forests and requires abundant light and a high level of underground water for good growth. In commercial forests it is today being replaced by the Carolina poplar (Populus canadensis Moench.), a hybrid between the black poplar and the northern cottonwood (P. deltoides). It is distinguished by rapid growth and is cultivated in plantations. The black poplar produces abundant stump suckers and is also propagated by cuttings. The pyramidal form Populus nigra italica (syn. pyramidalis), the Lombardy poplar, is widely planted in parks and alongside highways. The light wood is used to make plywood and cellulose.
The seeds are carried vast distances, thus making this a pioneer tree in clearings, pastures and fallow land. It also propagates well by root suckers. The wood is light, splits easily and is used to make matches, roof shingles and cellulose.
The twigs are yellow-brown to brown, the buds covered with a layer of balsam resin. The flowers and fruit are very much like those of the white poplar. The balsam poplar is a light-demanding tree that requires considerable moisture.
The juniper is a dioecious species, i.e. individual trees bear only male, or only female flowers. Inconspicuous, they are borne in the axils of the needles, maturing after two years into blue-black berry-like cones.
The white poplar grows in regions with a mild climate. It requires abundant light and ample moisture, and stands up well to flood water and slightly acidic soils. It is very attractive as an open- grown tree in water meadows, and, because of its vast root system, is used also to strengthen sand dunes. In intensive forest management it is being replaced by cultivated forms of black poplars. The wood is soft, and used to make cellulose and for turnery. The pyramidal form from Turkestan, known as Populus alba pyramidalis (syn. bolleana), often makes its appearance in parks. - 15266
About the Author:
Privacy, including protection from the dirt and noise of passing traffic, can be a garden planning problem where the house garden adjoins a busy street.
