Eucalyptus accedens
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Eucalyptus accedens |
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| W. Fitzg. |
Eucalyptus accedens is a species ofthe myrtle family (Myrtaceae). It occurs on the southern part of the west coast of Western Australia and is called "Powderbark" or "Powderbark Wandoo" there.
description
Appearance and leaf
Eucalyptus accedens grows as a tree that reaches heights of up to 2.5 to 25 meters. A lignotuber is formed. The bark is smooth, powdery and white, pink, pale orange or creamy pink all over the tree. There are oil glands in the marrow of the young branches, but not in the bark.
In Eucalyptus accedens is Heterophyllie ago. The leaves are always alternate and divided into petioles and leaf blades. On young specimens, the initially blue-green frosted or floured, later blue-green leaf blade with a length of 4 to 17 cm and a width of 3 to 11 cm is delta-shaped, with entire margins or slightly notched, shortened at the base of the blade or sometimes lobed and has a rounded shape or broadly pointed upper end. On middle-aged specimens, the leaf blade is elliptical to ovate, straight, with entire margins, and dull gray-green. The leaf blades on adult specimens are floured or frosted, matt gray-green or blue-green in the same color on the top and bottom, are 8 to 18 cm long and 1.2 to 3.0 cm wide, lanceolate to broadly lanceolate, relatively thick, Curved sickle-shaped, tapering towards the base of the blades and having a pointed or pointed upper end. The side nerves, which are barely recognizable, start at an acute or obtuse angle from the median nerve and form a very close-knit network. The so-called intermarginal nerves are clearly separated from the leaf margin. The oil glands lie between the nerves. The leaf stalks are 1.3 to 3.2 cm long. The cotyledons ( cotyledons ) are in two parts.
Inflorescence and flower
On the side of an inflorescence stem with a length of 7 to 17 mm and a width of up to 3 mm in cross-section narrowly flattened or angular inflorescence stem stand together in a simple inflorescence seven to eleven flowers. The 2 to 6 mm long flower stalks are angular. With a length of 10 to 14 mm and a diameter of 4 to 7 mm, the flower buds are cylindrical, egg-shaped or club-shaped and not floured or frosted blue-green. The sepals form a calyptra that falls off early. The smooth calyptra is hemispherical or conical, as long and as wide as the smooth flower cup (hypanthium). The flowers are white, creamy white or yellowish-creamy white. The flowering period in Western Australia extends from December or January to April.
Fruit and seeds
The stalked fruit is 9 to 10 mm long and 5 to 9 mm in diameter cylindrical, barrel or pear-shaped and three to four-faced. The disc is indented, the fruit compartments are enclosed, level with the edge or protrude slightly.
The seeds are ovate or flattened ovate with a length of 1.5 to 2.5 mm. The brown seed coat rarely has a reticulate structure. The hilum is in the middle.
Occurrence
The natural range of Eucalyptus accedens is the southern section of the west coast of Western Australia , around Perth . Eucalyptus accedens is found in the independent administrative districts of Beverley , Brookton , Carnamah , Chittering , Coorow , Cuballing , Dandaragan , Irwin , Kalamunda , Moora , Mundaring , Murray , Northam , Pingelly , Swan , Three Springs , Toodyay , Victoria Plains , Wandering , West Arthur , Williams and York , in the Mid West , Peel , Perth and Wheatbelt regions .
Eucalyptus accedens grows on gravelly laterite and clayey loam soils . Eucalyptus accedens can be found in lateritic outcrops or rocky mountain ridges.
Taxonomy
The first description of Eucalyptus accedens was made in 1904 by William Vincent Fitzgerald entitled Additions to the West Australian flora in the Journal of the West Australia Natural History Society , Volume 1, page 21. The type material has the label " Near Pingelly Nov. 1903rd - WVF “. The specific epithet accedens is derived from the Latin word accedere for to be close or similar and refers to the similarity of Eucalyptus accedens and Eucalyptus wandoo .
use
The heartwood of Eucalyptus accedens is dark red, very hard and hard-wearing and has a specific weight of 960 to 1170 kg / m³. The wood is only available to a limited extent and can only be used to a limited extent due to its heavy weight and great hardness.
Individual evidence
- ↑ a b Specimen search results: Eucalyptus accedens at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 7, 2013
- ↑ a b c APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved March 7, 2013
- ↑ a b c d Eucalyptus accedens in the Western Australian Flora . Retrieved March 7, 2013.
- ↑ a b c d e f g h i j k l Eucalyptus accedens at EUCLID: Eucalypts of Southern Australia by MIH Brooker, AV Slee & JR Connors. Retrieved March 7, 2013
- ↑ a b c d e f g h i Eucalyptus accedens at EucaLink - A Web Guide to the Eucalypts . Retrieved March 7, 2013.
- ↑ a b c d Powderbark Wandoo - Eucalyptus accedens in: DJ Boland, MIH Brooker, GM Chippendale, N. Hall, BPM Highland, RD Johnston, DA Kleinig, MW McDonald & JD Turner (editors): Forest Trees of Australia . CSIRO Publishing. 5th Edition 2006. pp. 352-353 at Google Books . Retrieved March 7, 2013
- ↑ Eucalyptus accedens at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 7, 2013.
- ↑ Rafaël Govaerts (ed.): Eucalyptus accedens. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 7, 2013.
