Eucalyptus microcarpa
Eucalyptus microcarpa is a plant in the myrtle family ( Myrtaceae ). It comes in southeast Queensland, the eastern, southern and central New South Wales, in the center-west of Victoria, as well as in the south of South Australia before. It is there, " Green- leaved Box", "black box ", " brown box ", " Grey Box ", "Narrow -leaved Grey Box ", " Western Grey Box ", " Southern Grey Box ", " Domestic Grey Box ", " domestic box " or " Gum -topped box" called.
Description
Appearance and leaf
Eucalyptus microcarpa grows as a tree reaching heights of growth of up to 25 meters. The bark remains on the trunk and larger branches, gray with whitish spots and fibrous integrally. On the upper parts of the tree it is smooth, gray and peels in short ribbons.
In Eucalyptus microcarpa is available Heterophyllie. The leaves are always divided into petiole and leaf blade. In seedlings, the leaf blade is ovate with a length of 5 to 9 cm and a width of 2 to 5 cm and at top and bottom slightly different colored green or gray-green. In young specimens the leaf blade is ovate with a length of 9 to 15 cm and a width of 3 to 5 cm and at top and bottom of the same color dull green or gray-green. The leaf blade to middle-aged specimens with the same color green upper and lower sides is ovate to broadly lanceolate with a length of 9 to 17,5 cm and a width of 2 to 4.5 cm. The same color on top and bottom glossy or matte green leaf blades of adult specimens are at a length of 8 to 15 cm and a width of 1 to 2 cm narrow - lanceolate to broadly lanceolate and straight, taper towards the Spreitenbasis and have a pointed or bespitztes upper end. The cotyledons ( cotyledons ) are wrong - kidney-shaped.
Inflorescence and flower
The flowering period extends from February to August. Terminally on a 3 to 10 mm long, flattened in cross-section or narrow -edged inflorescence stem are about seven to elfblütige part inflorescences in total composite inflorescences. When present, the flower stems with a length of 1 to 5 mm are angular or terete .. The flower buds are oval to spindle-shaped with a length of 4-9 mm and a diameter of 2 to 4 mm. The sepals form a calyptra, which remains available until flowering ( anthesis ). The Calyptra is conical, shorter or the same length as the flower cups ( Hypanthium ) and as wide as these. The flowers provide nectar much. All stamens are more or less fertile ( fertile ).
Fruit and seeds
The sedentary or short -stalked fruit is at a length of 3-7 mm and a diameter of 3 to 5 mm cropped barrel-shaped, cylindrical, hemispherical or rarely ovate, vierfächrig and often finely ribbed. The disc is flat or pressed, the fruit compartments are included at the level of the edge or.
The black, brown or gray seeds are flattened ovoid, often with a pointed end. The hilum is centered.
Occurrence
The natural range of Eucalyptus microcarpa is the heartland in the south east of Queensland, to the east, in the center and south of New South Wales, in the center-west of Victoria and southern South Australia.
Eucalyptus microcarpa grows widespread and locally very common in grassy, light forest on moderately fertile loam soils.
System
The first description was in 1902 by Joseph Maiden as a variety of the species Eucalyptus hemiphloia under the name ( basionym ) Eucalyptus microcarpa var hemiphloia Maiden in Transactions and proceedings and report, Royal Society of South Australia, Volume 26, p 11 The type material, the labeling common in the drier parts of the state on. Maiden gave her in 1923 to the rank of a species Eucalyptus microcarpa ( Maiden) Maiden in A Critical Revision of the Genus Eucalyptus, Volume 6 (8 ), pp. 438 Other synonyms for Eucalyptus microcarpa ( Maiden) Maiden and Eucalyptus Eucalyptus woollsiana RTBaker aff. odorata ( W.Wimmera ).
Natural hybrids of Eucalyptus microcarpa with Eucalyptus and Eucalyptus sideroxylon caleyi subsp. caleyi are known.
Use
The heartwood of Eucalyptus microcarpa is light brown, fine textured, hard and very resistant. Its specific weight is about 825 kg / m³.
The wood is used for example for railway sleepers and fences ..