Eucalyptus tetrodonta
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Eucalyptus tetrodonta |
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Eucalyptus tetrodonta is a species ofthe myrtle family (Myrtaceae). It occurs on the entire north coast of Australia and is called "Stringybark" or "Darwin Stringybark" there.
description
Appearance and leaf
Eucalyptus tetrodonta grows as a tree that reaches heights of 9 to 18 meters or even up to 25 meters and a breast height diameter (DHL) of around 0.6 meters. The gray bark remains on the entire tree, is fibrous and peels in short strips or small, polygonal patches. There are oil glands in both the bark and the marrow.
In Eucalyptus tetrodonta is Heterophyllie ago. The leaves are only divided into petioles and leaf blades on adult specimens, sitting in front of them. On seedlings , the leaf blade is lanceolate and lanceolate on the top and bottom of the leaf with a length of 6 to 17 cm and a width of 1.5 to 3.5 cm. On young specimens, the leaf blade is 15 to 30 cm long and 3.5 to 10 cm wide and lanceolate to ovate. On medium-old specimens, the dull gray-green leaf blade is 14.5 to 32 cm long and 2.8 to 6.5 cm wide and lanceolate to lanceolate, straight and with entire margins. Opposite to almost opposite in adult specimens. Their petioles are narrowly flattened or channel-shaped. Its leaf blades, of the same color on the top and bottom, are dull gray-green, with a length of 11 to 19 cm and a width of 1.4 to 3.0 cm narrow-lanceolate or lanceolate, relatively thick, tapering towards the base of the blade, have a pointed upper end and can be straight or crescent-shaped. The raised lateral nerves extend from the median nerve at an obtuse angle. The cotyledons ( cotyledons ) are kidney-shaped.
Inflorescence and flower
On the side of an inflorescence shaft with a length of 4 to 14 mm and a width of up to 3 mm in cross section, with a round, narrowly flattened or angular inflorescence stem, there are only about three flowers in a simple inflorescence . The not blue-green floured or frosted flower stalks are angular with a length of 1 to 7 mm, that of the middle bud is noticeably flattened. The flower buds are obovate or pear-shaped with a length of 8 to 25 mm and a diameter of 6 to 12 mm. The sepals are reduced to four teeth on the flower cup (hypanthium). The smooth or wrinkled calyptra is hemispherical, as long as the smooth flower cup and wider than this. The flowers are creamy white. The flowering period in Western Australia is June to September.
Fruit and seeds
The sometimes stalked fruit is cylindrical or bell-shaped with a length of 13 to 22 mm and a diameter of 10 to 14 mm. The disc is indented, the fruit compartments are enclosed or at the level of the rim.
The very irregularly shaped seeds are pyramidal, ribbed in the middle and gray-black. The hilum is in the middle.
Occurrence
The natural range of Eucalyptus tetrodonta is in northern Australia, north of the 15th parallel. In Western Australia , Eucalyptus tetrodonta occurs in the independent administrative districts of Derbv-West Kimberley , Halls Creek and Wyndham-East Kimberley in the Kimberley region . In the Northern Territory , Eucalyptus tetrodonta is found in the northern third of the country and in Queensland on the north coast and on the Cape York Peninsula .
Eucalyptus tetrodonta thrives mainly in plains and on plateaus on sandy soils over sandstone , laterite or quartzite .
Taxonomy
The first description of Eucalyptus tetrodonta in 1859 by Ferdinand von Mueller , entitled Monograph of the Eucalypti of tropical Australia in the Journal of the Proceedings of the Linnean Society, Botany , Volume 3, page 97. The type material has the inscription " In plagis elevatis nemorosis minus fertilibus terrae Arnhem's Land passim. Anth. Aug., Sept. “. The specific epithet tetrodonta is composed of the Greek words tetra for four and odontos for tooth and relates to the shape of the calyptra.
use
The heartwood of Eucalyptus tetrodonta is pale red-brown, quite hard and moderately hard-wearing and has a specific weight of 1040 to 1150 kg / m³. The wood is prone to termite infestation and is used for making stakes and building houses. The Aborigines carve didgeridoos out of it .
Individual evidence
- ↑ a b c Specimen search results: Eucalyptus tetrodonta at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved March 5, 2013
- ↑ a b c APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Last accessed April 24, 2013
- ↑ a b c d e f g h i j Eucalyptus tetrodonta at EucaLink - A Web Guide to the Eucalypts . Last accessed April 24, 2013.
- ↑ a b c d Eucalyptus tetrodonta in the Western Australian Flora . Last accessed April 24, 2013.
- ↑ a b c d e f g h i j D. J. 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. Darwin Stringybark - Stringybark (NT –WA) - Messmate (northern Qld. - WA) - Eucalyptus tetrodonta on pages 268–269. at google-books online. Last accessed April 24, 2013
- ↑ Eucalyptus tetrodonta at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed March 5, 2013.
- ↑ Rafaël Govaerts (ed.): Eucalyptus tetrodonta. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved March 5, 2013.
