Eucalyptus gomphocephala
Eucalyptus gomphocephala
Eucalyptus gomphocephala is a flowering plant within the myrtle family ( Myrtaceae ). It occurs in the southern part of the west coast of Western Australia and on the south coast of South Australia, where it is " Tuart " or " Tuart gum " called.
Description
Appearance and leaf
Eucalyptus gomphocephala grows as a tree, the growth reached heights of up to 10 to 40 meters. The bark remains on the entire tree is gray and short-fibred. In the marrow of young branches, there are oil glands, but not in the bark.
In Eucalyptus gomphocephala is available Heterophyllie. The leaves are always divided into petiole and leaf blade. The petioles are narrowly flattened or channel-shaped. Seedlings at the on top and bottom surfaces of different colors green leaf blade in a length of 6 to 9 cm and a width of 4 to 7 cm is egg, often also heart-shaped. In young specimens the different colors on the top and underside of the leaf blade are oval to heart-shaped with a length of 9 to 15 cm and a width of 5.5 to 10 cm. The on top and bottom of the same color dull gray - green leaf blade to middle-aged specimens is at a length of 12 to 20 cm and a width of 3 to 5 cm wide, lanceolate or elliptic to ovate, straight and entire. The same color on top and bottom mat green or gray - green leaf blades of adult specimens are lanceolate with a length of 9 to 16 cm and a width of 1.6 to 2.5 cm, curved like a sickle, taper towards the Spreitenbasis, can be relatively thin or relatively thick and have a blunt upper end. The barely visible lateral nerves go from an acute angle from the midrib. The cotyledons ( cotyledons ) are in two parts.
Inflorescence and flower
Page Constantly on a 13 to 27 mm long, flattened in cross-section wide inflorescence stem standing together about seven flowers in a simple inflorescence. Where available, the flower stalks are up to 4 mm long. The non- blue-green floured or frosted flower buds are club-shaped with a length of 14 to 20 mm and a diameter of 8 to 15 mm. The sepals form a calyptra, which drops early. The smooth calyptra is hemispherical or conical, one to two times as long as the smooth flower cup ( hypanthium ) and wider than this. The flowers are white or off- white. The flowering period extends into Western Australia from January to April.
Fruit and seeds
The sedentary or short -stalked fruit is bell-shaped with a length of 13 mm to 22 mm and a diameter of 13 mm to 17 mm, rarely cylindrical and often finely ribbed. The disc is flat or raised, the fruit trays are at the height of the edge or stand out.
The seeds are knee disc-shaped, often with an approach and gray-black. The hilum is centered.
Occurrence
The natural range of Eucalyptus gomphocephala is the southern section of the west coast of Western Australia to Perth, as well as the south coast of South Australia, south and west of Adelaide. Eucalyptus gomphocephala comes in Western Australia in the independent administrative districts of Bunbury, Busselton, Cottesloe, Dandaragan, Dardanup, Fremantle, Gingin, Harvey, Joondalup, Kwinana, Mandurah, Murray, Rockingham, Serpentine - Jarrahdale, South Perth, Swan, Wanneroo and Waroona in the regions of Peel, Perth, South West and Wheatbelt before.
Eucalyptus gomphocephala grows on sandy soils over limestone. Eucalyptus gomphocephala are found mainly in coastal plains.
Taxonomy
The first description of Eucalyptus gomphocephala took place in 1828 by Augustin- de Candolle Pyrame in Prodromus systematis Naturalis Vegetabilis, Volume 3, page 220 The type material has the label " in Nova - Hollandia " on. Synonyms for Eucalyptus gomphocephala DC. are Eucalyptus gomphocephala DC. var gomphocephala and Eucalyptus gomphocephala var rhodoxylon Blakely & H.Steedman.
Use
The heartwood of Eucalyptus gomphocephala is pale yellowish, finely structured, very hard and very resistant. Its specific weight is from 890 to 1160 kg / m³.
The wood was formerly wherever extra strength was required, for example in shipbuilding for keels and Heckspanten, as well as bridge abutments and used in railway carriages ..