Eucalyptus crebra

Eucalyptus crebra
	Eucalyptus crebra
Systematics
Order :	Myrtle-like (Myrtales)
Family :	Myrtle family (Myrtaceae)
Subfamily :	Myrtoideae
Tribe :	Eucalypteae
Genre :	Eucalyptus ( eucalyptus )
Type :	Eucalyptus crebra
Scientific name
	Eucalyptus crebra
	F. Garbage.

Eucalyptus crebra is a species ofthe myrtle family (Myrtaceae). It occurs in the eastern third of New South Wales and Queensland and is called "Gray Ironbark", "Narrow-leaved Ironbark", "Narrow-leaved Red Ironbark" or "Red Ironbark".

description

Trunk and bark

Leaves and inflorescences

Partial fruit stand of a compound fruit stand

Appearance and leaf

Eucalyptus crebra grows as a tree that can reach heights of up to 35 meters. The bark remains on the entire tree, is gray-black and rounded lengthways. The bark of the small branches is green. There are no oil glands in the marrow of the young branches or in the bark.

In eucalyptus crebra is Heterophyllie ago. The leaves are always divided into a petiole and a leaf blade. The leaf blade on seedlings is slightly different in color on the top and bottom and is 5 to 12.5 cm long and 0.4 to 2.5 cm wide and linear, narrow-lanceolate, lanceolate or broad-lanceolate . On young specimens, the leaf blades of the same color on the top and bottom are dull green to gray-green with a length of 7 to 12.5 cm and a width of 0.7 to 2.8 cm linear, narrow-lanceolate, lanceolate or broad-lanceolate . On medium-old specimens, the leaf blade is 10 to 17.5 cm long and 1.2 to 2.8 cm wide, linear to narrow-lanceolate, straight, with entire margins and dull gray-green. The leaf stalks on adult specimens are narrowly flattened or channel-shaped with a length of 10 to 15 mm. The leaf blades of the same color on the top and bottom of the adult specimens are dull green or gray-green and are 6.5 to 16 cm long and 0.7 to 1.7 cm wide, lanceolate, relatively thick, sickle-shaped, tapered to the The base of the blade and its upper end can be pointed or pointed. The lateral nerves can be barely visible or raised and come off the median nerve at close intervals at an acute angle. The cotyledons ( cotyledons ) are upside-kidney-shaped.

Inflorescence and flower

Terminally or laterally on a 4 to 12 mm long and in cross section pedunculate or angular inflorescence stem stand in compound total inflorescences about seven to eleven flowered partial inflorescences . The flower stalks are 1 to 6 mm long and stalk-round or angular. The not blue-green floured or frosted flower buds are egg-shaped, club-shaped, short spindle-shaped or diamond-shaped with a length of 3 to 6 mm and a diameter of 2 to 4 mm. The sepals form a calyptra that falls off early. The smooth calyptra is hemispherical or conical, often pointed, as long or twice as long as the smooth flower cup (hypanthium) and as wide as this. The flowers are white or creamy white. The flowering period extends from May to January.

Fruit and seeds

The stalked fruit is 3 to 7 mm long and 3 to 6 mm in diameter hemispherical, egg-shaped, cylindrical or kneecap-shaped and three- to fourfold. The disc is flat or indented, the fruit compartments are enclosed or at the level of the rim.

The gray-brown seed is ovate or compressed ovoid. The hilum is in the middle.

Occurrence

The natural range of Eucalyptus crebra is the eastern third of New South Wales and Queensland , from Picton in the south to Cape York in the north.

Eucalyptus crebra is widespread and often found in grassy, light or dense hard-leaf forests on moderately fertile, flat or sandy soils .

Systematics

The first description of eucalyptus crebra 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 87. The type material has the caption " A montibus Newcastle Range usque ad sinum Moreton Bay tam in solo fertiliore quam steriliore praceipue autem montano vel collino sylvas vastas apertas constituens. Anth. estate. " on. The specific epithet crebra is derived from the Latin word "creber" for frequent and probably refers to the frequency in some occurrences of this eucalyptus species. Synonyms of Eucalyptus crebra F.Muell. is Eucalyptus crebra var. macrocarpa Domin, Eucalyptus racemosa var. macrocarpa (Domin) Blakely, Eucalyptus elegans ARBean, Eucalyptus drepanophylla F. Muell. ex Benth., Eucalyptus xanthoclada Brooker & ARBean and Metrosideros salicifolia Sol. ex Gaertn.

There are a number of natural hybrids of Eucalyptus crebra, for example with: Eucalyptus brownii , Eucalyptus caleyi subsp. caleyi , Eucalyptus coolabah , Eucalyptus decorticans , Eucalyptus fibrosa subsp. fibrosa , Eucalyptus fibrosa subsp. nubila , Eucalyptus melanophloia , Eucalyptus microcarpa , Eucalyptus moluccana , Eucalyptus orgadophila , Eucalyptus shirleyi , Eucalyptus thozetiana .

use

The heartwood of Eucalyptus crebra is reddish brown to dark red and extremely resistant. It has a specific weight of 890–1200 kg / m³. The wood from Eucalyptus crebra is used as heavy construction timber for the manufacture of posts, railroad ties, cross braces and floors.

Eucalyptus crebra serves as a shade provider and avenue tree. It is also cultivated. Eucalyptus crebra is also important for honey production , as the flowers contain a lot of nectar and pollen.

Individual evidence

↑ ^a ^b Specimen search results: Eucalyptus umbra at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved April 10, 2013
↑ ^a ^b ^c ^d ^e APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved April 10, 2013
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q K. Hill: Eucalyptus crebra F. Muell. at New South Wales Flora Online . National Herbarium of NSW, Royal Botanic Garden, Sydney. Retrieved April 10, 2013
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w Eucalyptus crebra at EucaLink - A Web Guide to the Eucalypts . Retrieved April 10, 2013.
↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t Narrow-leaved Red Ironbark, Ironbark, Narrow-leaved Ironbark - Eucalyptus crebra 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. 482-483 at Google Books . Retrieved April 10, 2013
^ ^A ^b Rodger W. Elliot, David L. Jones, Trevor Blake: Encyclopaedia of Australian Plants Suitable for Cultivation. Volume 4: Eu – Go. Lothian Press, Port Melbourne 1992, ISBN 0-85091-213-X , p. 16. The author of the article had the source in the en-Wikipedia.
↑ Entry in Tropicos . Retrieved April 10, 2013
↑ Rafaël Govaerts (ed.): Eucalyptus crebra. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 10, 2013.

Web links

Commons : Eucalyptus crebra - collection of images, videos and audio files

[AVH-1] Specimen search results: Eucalyptus umbra at Australia's Virtual Herbarium. Council of Heads of Australasian Herbaria . Retrieved April 10, 2013

[APNI-2] APNI = Australian Plant Name Index . Center for Plant Biodiversity Research. Australian Government. Retrieved April 10, 2013

[NSWFo-3] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q K. Hill: Eucalyptus crebra F. Muell. at New South Wales Flora Online . National Herbarium of NSW, Royal Botanic Garden, Sydney. Retrieved April 10, 2013

[EucaLink-4] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t ^u ^v ^w Eucalyptus crebra at EucaLink - A Web Guide to the Eucalypts . Retrieved April 10, 2013.

[FTA-5] ↑ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ ^o ^p ^q ^r ^s ^t Narrow-leaved Red Ironbark, Ironbark, Narrow-leaved Ironbark - Eucalyptus crebra 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. 482-483 at Google Books . Retrieved April 10, 2013

[Enc-6] A ^b Rodger W. Elliot, David L. Jones, Trevor Blake: Encyclopaedia of Australian Plants Suitable for Cultivation. Volume 4: Eu – Go. Lothian Press, Port Melbourne 1992, ISBN 0-85091-213-X , p. 16. The author of the article had the source in the en-Wikipedia.

[tropicos-7] Entry in Tropicos . Retrieved April 10, 2013

[WCSP-8] Rafaël Govaerts (ed.): Eucalyptus crebra. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved April 10, 2013.