Eucalyptus patens

Eucalyptus patens
Eucalyptus patens
Systematics
Order : Myrtle-like (Myrtales) Family : Myrtle family (Myrtaceae) Subfamily : Myrtoideae Tribe : Eucalypteae Genre : Eucalyptus ( eucalyptus ) Eucalyptus patens
Scientific name
Eucalyptus patens
Benth.

Eucalyptus patens is a species ofthe myrtle family (Myrtaceae). It occurs in the southwest of Western Australia and is called "Blackbutt", "Swan River Blackbutt", "West Australian Blackbutt" or "Yarri" there.

description

Appearance and leaf

Eucalyptus patens grows as a tree that reaches heights of 3 to 25 meters. The bark remains on the smaller branches, is greyish on the outside and yellowish on the inside, rough and grooved lengthways.

In Eucalyptus patens is Heterophyllie ago. The sitting leaves on seedlings are 8 to 14 cm long and 4 to 7 cm wide and are egg-shaped to heart-shaped and are gray-green in different colors on the top and bottom. On young specimens, the leaves only grow larger at first, but then develop petioles. Its leaf blade is egg-shaped with a length of 12 to 22 cm and a width of 7 to 10 cm, tapers significantly towards the upper end and forms a crescent-shaped tip, which is bent downwards and where the water drips off. The leaves on middle-aged and adult specimens are always divided into a petiole and a leaf blade. On middle-aged specimens, the leaf blade is 15 to 20 cm long and 3 to 5 cm wide and lanceolate, curved sickle-shaped, green on the top and bottom of the same color and has a pointed upper end. The leaf blades of the same color on the upper and lower sides on adult specimens are lanceolate, 10 to 16 cm long and 1.2 to 3 cm wide, usually curved sickle-shaped and have a pointed upper end. The cotyledons ( cotyledons ) are kidney-shaped.

Inflorescence and flower

Lateral on a 10 to 20 mm long and slightly or clearly angular in cross section inflorescence stem stand together in a simple inflorescence seven to eleven flowers. The flower stalk is 1 to 4 mm long. The flower bud is ovoid to spherical with a length of 8 to 10 mm and a diameter of 5 to 6 mm. The sepals form a calyptra that remains in place until flowering ( anthesis ). The flower cup is slightly bell-shaped, the calyptra beak-shaped or conical. The flowers are white or creamy white. The flowering period in Western Australia extends from July to August, from November to December or from January to February.

Fruit and seeds

The short-stalked fruit is 9 to 14 mm in length and 9 to 12 mm in diameter, ovate to spherical and three to five pods. The disc is indented and the fruit compartments are enclosed or level with the rim.

The glossy brown seeds are D-shaped. The hilum is at the top of the seed.

Occurrence

Eucalyptus patens is found in the southwest of Western Australia . Eucalyptus patens occurs in the independent administrative districts of Albany , Armadale , Augusta-Margaret River , Beverley , Boddington , Bridgetown-Greenbushes , Busselton , Cockburn , Collie , Cranbrook , Denmark , Donnybrook-Balingup , Harvey , Kalamunda , Manjimup , Mundaring , Murray , Nannup , Plantagenet , Serpentine-Jarrahdale , Swan , Wandering , Williams and York in the Great Southern , Peel , Perth , South West and Wheatbelt regions .

Eucalyptus patens grows on stony soils , sandy clay and loam in depressions, on the banks of watercourses and in valleys.

Taxonomy

The first description of Eucalyptus patens was made in 1867 by George Bentham in Flora australiensis , Volume 3, page 247. The type material has the caption " W. Australia. Harvey River, "Black-butt," Oldfield; Tone River and granite rocks near Cape Arid, Maxwell; also Dummond, 4th Coll. n. 72; Gilbert; JS Roe; and in Preiss's collection (...) “. The specific epithet patens is the Latin word for open or protruding and apparently refers to the spreading treetop .

Use and endangerment

The heartwood of Eucalyptus patens is light brown to dark brown, hard, moderately resistant and its specific weight is 690 - 915 kg / m³. The wood from Eucalyptus patens is used as construction timber, for example to make railway sleepers , floors , cladding and boxes .

The availability is low. The wood of Eucalyptus patens should be for nature conservation reasons not used, unless it comes from fallen trees.

Eucalyptus patens is used as an ornamental plant in parks.

Individual evidence

1. ↑ ^{a b} Specimen search results: Eucalyptus patens at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved April 16, 2013
2. ↑ ^{a b c} APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved April 16, 2013
3. ↑ ^{a b c} Eucalyptus patens at EucaLink - A Web Guide to the Eucalypts . Retrieved April 16, 2013.
4. ↑ ^{a b c d e f} Eucalyptus patens in the Western Australian Flora . Retrieved April 16, 2013
5. ↑ ^{a b c d e f g h i} Yarri, Blackbutt, Swan River Blackbutt, Western Australian Blackbutt - Eucalyptus patens in: DJ Boland, MIH Brooker, GM Chippendale, N. Hall, BPM Highland, RD Johnston, DA Kleinig, MW McDonald & JD Turner (Editor): Forest Trees of Australia . CSIRO Publishing. 5th edition 2006. p. 516 at Google Books . Retrieved April 16, 2013
6. ↑ Eucalyptus patens at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed April 16, 2013.
7. ↑ Rafaël Govaerts (ed.): Eucalyptus patens. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 15, 2013.
8. ^ Western Australian Blackbutt - Eucalyptus patens - Timber Advisory Notes . Department of Agriculture and Food. Government of Western Australia  ( page no longer available , search in web archives )  Info: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice. Retrieved April 16, 2013  
9. ↑ The RIC Good Wood Guide - Please Avoid these Australian Species - RainforestInfo.org . Retrieved April 16, 2013
10. ↑ Eucalyptus patens - Blackbutt . AustraliaPlants ( Memento of the original from February 22, 2008 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved April 16, 2013