Eucalyptus delegatensis
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Eucalyptus delegatensis |
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Eucalyptus delegatensis is a species ofthe myrtle family (Myrtaceae). It occurs in the Australian Alps and Tasmania and is called "Alpine Ash", "Australian Oak", "Tasmanian Oak", "Woolybutt", "Blue Leaf", "White Top", "Whitetop Stringybark" or "Gum- topped Stringybark "called.
description
Appearance and leaf
Eucalyptus delegatensis grows as a tree that reaches heights of up to 50 meters, rarely up to 90 meters. The bark remains on the lower part of the trunk or on the entire trunk, is gray, gray-brown or red-brown and has short fibers or stripes. On the upper parts of the tree it is smooth, gray to gray-brown and peels in long ribbons. The bark of the small branches is green. There are no oil glands either in the bark or in the marrow of the young branches.
In eucalyptus delegatensis is Heterophyllie ago. The leaves are always divided into a petiole and a leaf blade. On young specimens, the leaf blade is broadly lanceolate to ovate and dull gray-green. On middle-aged specimens, the dull gray-green leaf blade with a length of about 25 cm and a width of about 10 cm is also broad-lanceolate to ovate, sickle-shaped and curved with entire margins. The green leaves of the same color on the top and bottom of adult specimens are 10 to 20 cm long and 1.5 to 4.0 cm wide, lanceolate, sickle-shaped, relatively thick and can have a pointed or blunt upper end . The raised lateral nerves start at an acute or very acute angle at medium distances from the median nerve. The cotyledons ( cotyledons ) are kidney-shaped.
Inflorescence and flower
On the side of a pedicel-round, narrow-flattened or angular inflorescence stem with a length of 9 to 20 mm and a width of up to 3 mm in cross section, there are about seven to fifteen flowers together in a simple inflorescence . The flower stalks are 2 to 7 mm long and stalk-round. The sometimes blue-green floured or frosted flower 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 that remains in place until flowering ( anthesis ). The smooth calyptra is hemispherical or short-conical, sometimes also beak-shaped, shorter than or as long as the smooth flower cup (hypanthium) and as wide as this. The flowers are white or creamy white.
fruit
The stalked fruit is 8 to 15 mm long and 6 to 11 mm in diameter hemispherical, pear or egg-shaped and three to five pods. The disc is indented or rarely flat, the fruit compartments are included.
Occurrence
The natural range of Eucalyptus delegatensis are the Australian Alps from southeastern New South Wales and the Australian Capital Territory to east and central Victoria . They are also found in Tasmania .
Eucalyptus delegatensis grows widespread and often also predominantly in subalpine, grassy hardwood forests on deep, nutrient-rich soils , often also on slopes.
Systematics
The first description of eucalyptus delegatensis was made in 1900 by Richard Thomas Baker in Proceedings of the Linnean Society of New South Wales , Volume 25, page 305, Table XVI. The type material has the inscription " Delegate Mountain, NSW (W. Bäuerlen) ". The specific epithet delegatensis indicates the location of the type material at Delegate .
Of eucalyptus delegatensis RTBaker there are two subspecies:
- Eucalyptus delegatensis RTBaker 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 risdoni var. elata Benth. orth. var., Eucalyptus risdonii var. elata Benth.
Individual evidence
- ↑ a b Specimen search results: Eucalyptus delegatensis at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 15, 2013
- ↑ a b c d e f g h i j k l m n o p Eucalyptus delegatensis at EucaLink - A Web Guide to the Eucalypts . Retrieved March 15, 2013.
- ↑ a b c d APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved March 15, 2013
- ↑ a b c d e f g h K. Hill: Eucalyptus delegatensis RTBaker at New South Wales Flora Online . National Herbarium of NSW, Royal Botanic Garden, Sydney. Retrieved March 15, 2013
- ↑ Eucalyptus delegatensis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 15, 2013.
- ↑ a b Rafaël Govaerts (Ed.): Eucalyptus delegatensis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 15, 2013.
