Eucalyptus wandoo
Eucalyptus wandoo
Eucalyptus wandoo is a flowering plant in the myrtle family ( Myrtaceae ). It occurs in the southwest and west of Western Australia where it is known " White Gum " or " wandoo ".
Description
Appearance and leaf
Eucalyptus wandoo grows as a tree reaching heights of growth 3-25 meters. The bark is smooth on the whole tree and white or yellow marrow in the young branches, there are oil glands, but not in the bark.
In Eucalyptus wandoo occurs Heterophyllie. The leaves are arranged according to the period of youth in petiole and leaf blade. On seedlings, the bare and on top and bottom of the same color blue green leaf blade with a length of 5 to 10 cm and a width of 2.5 to 5 cm is heart - to egg-shaped. In young specimens the leaves are sessile, ovate to broadly lanceolate, glabrous and the same color on top and bottom blue green with a length of 9 to 13 cm and a width of 3 to 10 cm. At middle-aged specimens the hairy, dull gray - green leaf blade is at a length of 10 to 16 cm and a width of 2 to 4 cm, lanceolate, elliptic or ovate, straight, entire. The hairy, on top and bottom of the same color dull green or gray - green leaf blade of adult specimens is lanceolate to narrow - lanceolate, relatively thick, curved like a sickle with a length of 8 to 15 cm and a width of 1 to 2.4 cm, tapering to the Spreitenbasis and has a pointed upper end. The barely visible lateral nerves go off at an acute or obtuse angle from the midrib. The cotyledons ( cotyledons ) are divided into two parts.
Inflorescence and flower
Constantly on a page with a length of 15 to 20 mm and a diameter of up to 3 mm terete in cross section, narrowly flattened or angular inflorescence stem are in a simple inflorescence about eleven to seventeen flowers together. The flower stalks are 1-5 mm long. The non- blue-green floured or frosted flower buds are spindle-shaped with a length of 10 to 21 mm and a diameter of 3 to 4 mm. The sepals form a calyptra, which drops early. The smooth calyptra conical or horn- shaped, as long, twice or three times as long as the smooth flower cup ( hypanthium ) and as wide as this. The flowers are white or off- white. The flowering period extends into Western Australia from December or January to May or November to April.
Fruit and seeds
The stalked crop is at a length of 5 to 10 mm and a diameter of 3 to 6 mm reversed - conical, cylindrical, or pear-shaped and three-to vierfächrig. The disc is pressed, the fruit trays are at the height of the edge or stand out easily.
The nearly spherical or cubic seed has a gray - brown seed coat. The hilum is centered.
Occurrence
The natural range of Eucalyptus wandoo is the southwest and west of Western Australia. Eucalyptus wandoo occurs within the autonomous districts Beverley, Brookton, Corrigin, Gingin, Goomalling, Manjimup, Merredin, Narembeen, Pingelly, Serpentine - Jarrahdale, Toodyay, Victoria Plains, West Arthur and York in the regions of Peel, South West and Wheatbelt.
Eucalyptus wandoo thrives on sandy or clayey loam, gravel, laterite and granite on rocky ridges and rolling terrain.
System
The first description was in 1867 by George Bentham as a variety ( basionym ) Eucalyptus redunca var elata Benth. in Flora Australiensis, Volume 3, pp. 253 The type material has the inscription Kalgan River, " White Gum ," Oldfield. William Faris Blakely gave her in 1934 to the rank of a species Eucalyptus wandoo Blakely in A Key to the Eucalypts ..., p 112.Das epithet wandoo corresponds to the name that gave the Aborigines of this tree species.
From Eucalyptus wandoo there are two subspecies:
- Eucalyptus wandoo subsp. pulverea Brooker & Hopper: Come before to Morawa in the northern part of the range of Cataby. The bark is smooth and powdery - white, the bark of small branches is floured blue green or frosted.
- Eucalyptus wandoo Blakely subsp. wandoo, syn. Eucalyptus redunca shower, Eucalyptus redunca subsp. elata Benth. Occurs in the southern part of the range of Gin Gin and Bindi Bindi south to the Hay River north of Denmark. The bark is smooth and white, the bark of small branches is not blue green flour dusted or frosted.
There are natural hybrids of Eucalyptus wandoo with Eucalyptus and Eucalyptus gomphocephala loxophleba.
Use
Forests with Eucalyptus wandoo are now valued as recreational areas and for the protection of groundwater.
From the nectar of Eucalyptus wandoo bees produce a popular type of honey.
The heartwood of Eucalyptus wandoo is yellowish or light reddish brown, very hard, extremely durable, and has a specific gravity of 1040-1155 kg / m³. The wood of Eucalyptus wandoo is used for railway sleepers, poles, floors and all forms of light and heavy constructions.
Wood and bark of Eucalyptus wandoo included in commercially exploitable quantity of tannin.