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

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…

American Arbor-vitae or White Cedar Thuja occidentalis L.
Trees And Shrubs

American Arbor-vitae or White Cedar Thuja occidentalis L.

American Arbor-vitae or White Cedar Thuja occidentalis L. Cupressaceae This tree is a native of the eastern United States and Canada, where it is found mainly in river valleys and moderately swampy sites. It was introduced into Europe as early as 1540 and today is widely cultivated there, especially in parks and cemeteries. The growth…

Austrian Pine Pinus nigra
Trees And Shrubs

Austrian Pine Pinus nigra

Pinaceae The Austrian pine is a native of the Mediterranean countries, Spain, Calabria, Corsica, Balkan Peninsula and Asia Minor. The natural northernmost limit of its distribution was originally Austria, but today the Corsican and Austrian varieties especially are widely cultivated for their rapid growth, and high quality wood, in western and central Europe. It was…

Tree Fruits and Seeds
Trees And Shrubs

Tree Fruits and Seeds

The fertilized egg cell develops into an embryo which, with certain reserve tissues, forms the seed which is enclosed in a protective covering called the seed coal. The Fruit is a ripened ovary, its walls forming the seed vessel, and contains one or more seeds. In most conifers the seeds are contained in a cone…

How Tree Leaves Work
Trees And Shrubs

How Tree Leaves Work

The leaves of woody plants consist of the stalk or petiole and the lamina or blade. The petiole facilitates movement and positioning of the leaf. The blade is the part where photosynthesis, respiration and transpiration take place. Though all have the same function, the leaves of the various species differ greatly in shape and size…

STRUCTURE OF A TREE
Trees And Shrubs

STRUCTURE OF A TREE

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 AND MAN
Trees And Shrubs

TREES AND MAN

Even though the process of civilization has made man independent of nature and raised him to a higher level, yet he is continually aware of the fundamental influence of nature on generations of mankind. Plants are a necessary condition of civilization, and of all life on Earth. Without plants, which are capable of producing organic…