Besides the giant sequoias belongs to the largest Douglas fir trees in the world.
Douglas is the only representative of his race. It is not a spruce nor pine, and therefore called it the best thing to Douglas, although he is also known as Douglas fir. He was in Europe in the 19th century, introduced by botanists and Douglas Menzies, who from the jungle-like forest of Douglas North America was first sent seeds to England. Some of the resulting trees were, still live. With us, we find Douglas in forests, gardens and parks.
The name fir (Tsuga false) refers to mean anything, because he has nothing to do with Tsuga. The old scientific name Pseudotsuga douglasii is our common name derives Douglas.
Features of this plant douglas fir
In America, this 100 m tall tree. In Europe reaches more than 50 m. It is a fast growing conifer. The first crown is conical, flattened later. By the vertical protruding, heavy branches, he broad and irregular in shape.
The most obvious features are the reddish-brown, pointed buds at the end of the twigs. They look like thick beech buds. Douglas is monoecious. The male flowers are close together on the underside of the twigs, are cylindrical and yellow. The female flowers are upright cones at the terminal bud, green or red. Both ripen at different times so that no self-pollination can take place. The flowers bloom in late March.
The cones are ovoid, with dark brown seeds hanging scales where each of the three points of what paler dekschubben bottom-stabbing, a trident on his head.
The bark is smooth and the juvenile stage with numerous resin blow. A mature Douglas, he is rough and corky, dark full of cracks and grooves.
The needles are bright green and smooth. At the bottom, they are dull green, fragrant when bruised.
The thinner branches bending under the weight of the dense carpet of soft needles and hang like garlands at the bottom of the larger branches.
The cones are pendulous.
It grows best on deep, moderately acid, sandy loam soil.
There are two distinct varieties: the standard green or Douglas fir (var. menziesii) in the rainy west coast of North America, suitable for our region and the blue Douglas fir (var. glauca) in the more inland mountain areas of the Rocky Mountains. It grows slower, will not exceed 25 m. The needles are shorter and bluish green. He also grows well on chalk and limestone soils.
The big cone Douglas fir (Pseudotsuga macrocarpa) is native to California and is sometimes planted in gardens and arboreta. He is with us not winter hardy.
Using the Douglas fir wood
Douglas has yellowish sapwood to a reddish brown core.
He is one of the best timber suppliers in the world. He is “Oregon Pine” or “Columbia Pine’genoemd.
It is very suitable for ship and house building and carvings
Pseudotsuga menziesii (Bot.)
Douglas fir, Rocky Mountain fir (Eng.)
Sapin the Douglas (French)
Green or Blue Douglasie (German)
Pinaceae – pine family
Trees: Eucalyptus as beautiful and special tree in the garden
Eucalyptus (fever tree)
Autumn is the time of the advancing colds. Several eucalyptus preparations help us more comfortable again rid: candies, essential oil, tea, syrup, suppositories. But what is actually a type of plant Eucalyptus?
Eucalyptus globulus Tasmanian Blue Gum is known as a very fast growing, evergreen deciduous tree with a straight trunk and usually open, at first conical, later rounded crown. In tropical and subtropical regions reaches a height of 60 m, in southern Europe than 40 m. In the Netherlands, eucalyptus trees offered by garden centers. If you have space in the garden, such a tree is nice, because the pungent odor of its leaves, he flies and mosquitoes at bay, they say. origin
The genus Eucalyptus comprises about 600 species, in south-eastern Australia and Tasmania all forests. They are also native to New Zealand, eastern Indonesia, Brazil and South Africa. In the mild climate of the Mediterranean, Southwest England, Ireland and western Scotland during the winter they can survive only with us, ask the chilly climate of the mountains sham species.
The name Eucalyptus comes from the Greek eu (good) and kalyptos (hat), which is related to the flowers of stamens and pistils are on and together resemble a hat. Globulus means small bud, which in the cap of the fruit stores.
Eucalyptus globulus has two different leaf forms: the juvenile leaves are opposite and ovate, blue-green and white frosting, while the later-formed leaves are scattered and leathery, lanceolate, glossy dark green and often curved sickle. The leaves contain oil, contain tannic acid digest and difficult, so there is no undergrowth possible, but that the fallen leaves removed.
The flowers are only three or together in the leaf axils. They are in the beginning urnvormige, frosted white buds with a lid consisting of four fused petals exists. Before he falls off the bloom, with many white to reddish stamens visible. These look like a hat.
The fruits are up to 3 cm wide, woody, veelzadige capsules.
The rapid growth of the stem peels off easily, making the trunk appear gray to brown striped.
Eucalyptus trees are native to where they are often used to drain wetlands and thus to combat malaria. These trees have an extensive root system as a sponge can absorb much moisture. The wood is resistant to attack by termites. It is also widely used as raw material for paper.
Fever tree the name refers to the earlier belief that with eucalyptus fight fevers. Nowadays all kinds of eucalyptus preparations made to help counter: colds, respiratory illnesses, bronchitis. The dried leaves are used as eucalyptus oil.
Eucalyptus preparations should not be used during pregnancy and inflammation of stomach, intestine, bile and liver.
Somewhat frost-resistant species of eucalyptus trees that are up to 2000 m in the Australian Alps to grow:
Eucalyptus archerii flowers with many white flowers.
Eucalyptus greg sonia has sickle-shaped leaves and reddish branches.
Eucalyptus perriniana has large, rounded leaves that grow around the branch when they are young.
The dwarf Eucalyptus pauciflora ‘Nana’ is only 1.50 m.
Eucalyptus niphophila ‘Snowgun’ is resistant to frost of -20 ° C. Its bark peels off as he gets older. Its leaves are oblong and steal the leaves red. It can grow 1 m per year.
Eucalyptus debeuzevillei has blue green leaves with yellow steal.
Many Eucalyptus gunii sold its small round leaves as the tree is young and later be elongated. To keep the small leaves, the tree should be pruned every year. He can stand frost down to – 14 ° C.
Eucalyptus does not like our fluctuating climate in winter. So it can happen that the alternation of cold and mild stages of growth stagnates, the tree verpietert and maybe, hopefully when bush comes back because the lower part of the stem shoots developed.
Eucalyptus nicholii comes more easily as a shrub or other species.
Location and Pruning
Eucalyptus can be properly pruned. He then gets a shrub. The tree should be well informed about shooting tied to a sturdy pole (eg with an old nylon stocking) because he is very sensitive to high winds. So he stands up in a sheltered place. He does it do all types of soil, is less hardy on peat soil because there’s growth later in the year ends on sandy soil.
Eucalyptus globulus (botanical)
Blue Gum Tree, Stringy Bark Tree (English)
Eucalyptus bleu (French)
Eukalyptus, Blaugummubaum, Fieberbaum (German)
Myrtaceae – myrtle family