Eucalyptus sideroxylon
Mugga Eucalyptus
The Mugga Eucalyptus (Eucalyptus sideroxylon ) is a flowering plant in the myrtle family ( Myrtaceae ). It occurs sporadically in the southeast of Australia. and is there called " Mugga ", "Red Ironbark " or " Mugga Ironbark ".
Description
Appearance and leaf
The Mugga Eucalyptus grows as a tree reaching heights of growth of up to 35 meters. The bark remains on smaller branches or the entire tree and is reddish brown (hence the common name " Ironbark " ) or black - brown. On the upper parts of the tree, the bark is smooth, white or gray and peels in short ribbons. The small branches are green. Oil glands there is neither in the bark still in the marrow.
When Mugga Eucalyptus is available Heterophyllie. The leaves of young specimens are broad - lanceolate or ovate. The petioles of middle-aged and adult specimens are 10-20 mm long. The matt green, matt gray - green or blue-green leaf blades on floured middle-aged specimens are broad - lanceolate or ovate with a length of 5 to 10 cm and a width of 2 to 5 mm, straight or sickle-shaped and entire. The one on the upper leaf surface and bottom of the same color dull green or gray - green, relatively thick leaf blade of adult specimens is at a length of 7 to 14 cm and a width of 1.2 to 1.8 cm lanceolate, straight, cut with tapered Spreitenbasis and pointed top. The raised or indistinct lateral nerves going to be seen from great distances in acute angle from the midrib.
Inflorescence and flower
Constantly on a page with a diameter of up to 3 mm in cross section with narrow flattened or angular, 7-20 mm long inflorescence stem standing together about seven flowers in a simple inflorescence. The stalk round flower stalk is 2-15 mm long. The sometimes blue green floured or frosted flower bud is ei -, club- or short spindle-shaped with a length of 7 to 12 mm and a diameter of 4 to 6 mm. The sepals form a " calyptrata " or " operculum " that still to flowering ( anthesis ) is retained. The smooth calyptra conical or beaked, shorter and narrower than the smooth flower cup ( hypanthium ). The outer stamens are infertile. The flowers are white, cream, yellow, pink or red.
Fruit
The fruit is spherical, hemispherical or ovoid with four or five compartments fruit at a length of 5 to 11 mm and a diameter of 5 to 9 mm. The disc is pressed and the fruit trays are included.
Occurrence
The Mugga Eucalyptus comes in southeast Queensland, is present in the eastern half of New South Wales and the central and eastern Victoria. It occurs sporadically, but in places, often on. It grows in sparse sclerophyll forest, preferably on lighter, nutrient-poor soils.
Taxonomy
The first description of Eucalyptus sideroxylon was made in 1887 by William Woolls in Proceedings of the Linnean Society of New South Wales, Series 2, Volume 1, p 859 The type material has the label " New South Wales, near Mt Caley, R. Lachlan, A. Cunningham 205 June 3, 1817 ( holo K, iso BM ) "on. However, it was not specified type material. Woolls only published Cunningham's name. When the type is viewed from the collection, refers to which Cunningham in Mitchell, p 339. A synonym for Eucalyptus sideroxylon A.Cunn. ex Woolls is Eucalyptus leucoxylon F.Muell.
From Eucalyptus sideroxylon are two subspecies:
- Eucalyptus sideroxylon subsp. improcera A.R.Bean
- Eucalyptus sideroxylon A.Cunn. ex Woolls subsp. sideroxylon, syn. Eucalyptus leucoxylon var pallens Benth, Eucalyptus sideroxylon var minor ( Benth. ) Maiden, Eucalyptus leucoxylon var minor Benth, Eucalyptus sideroxylon A.Cunn. .. ex Woolls var sideroxylon.
The former subspecies Eucalyptus sideroxylon subsp. tricarpa LASJohnson has the rank of a species Eucalyptus tricarpa ( LASJohnson ) LASJohnson & KDHill.
Use
In addition to the use of wood as firewood and construction timber, the leaves of the tree of the production of eucalyptus oil cineolbasiertem serve.
Ingredients
Stilbenes and other polyphenols, which are produced by plants in attacks by pathogens are called phytoalexins. Such substances may be accepted at hypersensitive response of plants to pathogens. With the high content of polyphenols in the wood of Eucalyptus Mugga its natural resistance can be explained against rot.