Eucalyptus delegatensis
Eucalyptus delegatensis is a flowering plant within the myrtle family ( Myrtaceae ). It occurs in the Australian Alps and in Tasmania, where it is "Alpine Ash ", " Australian Oak ", " Tasmanian Oak ", " Woolybutt ", " Blue Leaf ", " white top " Whitetop Stringybark "or" Gum -topped called Stringybark ".
Description
Appearance and leaf
Eucalyptus delegatensis grows as a tree, the growth heights of up to 50 meters, rarely up to 90 meters, is reached. The bark remains on the lower part of the stem or the entire trunk is gray, gray - brown or red-brown and short-fibred up streaky. On the upper parts of the tree it is smooth, gray to gray - brown and peels off in long strips. The bark of young branches is green. Oil glands there is neither in the bark, nor in the marrow of the young branches.
In Eucalyptus delegatensis is available Heterophyllie. The leaves are always divided into petiole and leaf blade. In young specimens the leaf blade is broadly lanceolate to ovate and dull gray - green. At middle-aged specimens is the dull gray - green leaf blade with a length of about 25 cm and a width of about 10 cm also wide - lanceolate to ovate, curved like a sickle and entire. The on top and bottom of the same color glossy green leaves on adult specimens are lanceolate with a length of 10 to 20 cm and a width of 1.5 to 4.0 cm, curved like a sickle, relatively thick and may have a pointed or blunt upper end .. The raised lateral nerves go into an acute or very acute angle from in average distances from the central nerve. The cotyledons ( cotyledons ) are kidney-shaped.
Inflorescence and flower
Constantly on a page with a length of 9 to 20 mm and a width up to 3 mm in cross section terete, narrowly flattened or angular inflorescence stem are in a simple inflorescence about seven to fifteen flowers together. The flower stalks are 2-7 mm long and terete. The sometimes blue green floured or frosted his buds are club-shaped with a length of 5 to 6 mm and a diameter of 3 to 4 mm. The sepals form a calyptra, which remains available until flowering ( anthesis ). The smooth calyptra is hemispherical or short conical, sometimes beak -shaped, shorter than or as long as the smooth flower cup ( hypanthium ) and as wide as this. The flowers are white or off- white.
Fruit
The stalked fruit is hemispherical with a length of 8 to 15 mm and a diameter of 6 mm to 11 mm, pear or egg-shaped and three to fünffächrig. The disc is pressed or rarely flat, the fruit trays are included.
Occurrence
The natural range of Eucalyptus delegatensis are the Australian Alps from the south-eastern New South Wales and the Australian Capital Territory to the east and the center of Victoria. Also in Tasmania they occur.
Eucalyptus grows delegatensis widespread and often dominant in subalpine, sclerophyllous forest grassy to deep, rich soils, often on slopes.
System
The first description of Eucalyptus delegatensis took place in 1900 by Richard Thomas Baker in Proceedings of the Linnean Society of New South Wales, Volume 25, p 305, Plate XVI. The type material has the caption " Delegate Mountain, NSW (W. Bäuerlen ) "on. The specific epithet delegatensis points to the location of the type material at Delegate.
From Eucalyptus delegatensis RTBaker there are two subspecies:
- Eucalyptus delegatensis R.T.Baker subsp. delegatensis, syn. Eucalyptus obliqua var alpina Maiden
- Eucalyptus delegatensis subsp. tasmaniensis Boland, syn. Eucalyptus risdoni var elata orth var Benth, Syn. Eucalyptus tasmanica Blakely, Eucalyptus gigantea Hook.f. nom. illeg. , Eucalyptus elata var risdoni Benth. orth var, var risdonii Eucalyptus elata Benth.