Eucalyptus aggregata
Eucalyptus aggregata is a flowering plant in the myrtle family ( Myrtaceae ). It occurs in central and southern section of the Great Dividing Range to the east of New South Wales and southern Victoria, where it is " Black Gum ", " Sally ", " Messmate ", " Peppermint ", " Swamp Peppermint " or " Flooded called Gum ".
Description
Appearance and leaf
Eucalyptus aggregata grows as a tree reaching heights of growth of up to 18 or 20 meters. He forms a Lignotuber. The bark remains on the entire tree is gray to gray-black and fibrous - piece with white spots. There are smaller branches (diameter <8 cm) it is smooth. The bark of young branches is green. Oil glands are there in the bark, but not in the marrow of the young branches.
In Eucalyptus aggregata is available Heterophyllie. The leaves are always divided into petiole and leaf blade. In young specimens the leaf blade is elliptic at a length of 4 to 7 cm and a width of 1.5 to 3 cm, ovate, broad - lanceolate or lanceolate with smooth or wavy Spreitenrand and dull green. At middle-aged specimens, the leaf blade is at a length of about 10 cm and a width of about 3 cm elliptical, ovate or broad - lanceolate, straight, entire, dull and green. The petioles of adult specimens are 4-10 mm long. The on top and bottom of the same color glossy green leaf blade in adult specimens with a length of 5 to 12 cm and a width of 1 to 2.5 cm narrow - lanceolate to lanceolate, relatively thick, straight, tapering to the Spreitenbasis and has a round top end. The barely visible lateral nerves go in average distances from an acute or very acute angle from the midrib. The parallel to the blade edge extending, so-called Inter marginal nerves run along the leaf edge or be clearly separated from this, sometimes they are also twice before. On the surfaces of leaves oil glands are present. The cotyledons ( cotyledons ) are wrong - kidney-shaped.
Inflorescence and flower
Page Constantly on a 1 to 5 mm long, terete in cross section inflorescence stem standing together about seven flowers in a simple, unbranched inflorescence. The flower stalks are, if any, up to 2 mm long and terete. The green or yellow and not blue green floured or frosted flower buds are egg-shaped with a length of 3 to 5 mm and a diameter of 2 to 3 mm. The sepals form a calyptra, which drops early. The smooth calyptra is hemispherical or conical, shorter, just as long or twice as long as the smooth flower cup ( hypanthium ) and as wide as this. The flowers are white or off- white.
Fruit and seeds
The fruit is hemispherical with a length of 2 to 4 mm and a diameter of 3 to 5 mm, conical or inverted conical, and three to vierfächrig. The disc is flat or slightly raised, the fruit of subjects stand out.
The seeds are at a length of 1.2 to 2 mm, oval or flattened oval, often bespitzt at one end, sometimes also serrated. The gray - brown seed coat is smooth on the back. The hilum is centered.
Occurrence and risk
The natural range of Eucalyptus aggregata is the northern and central portion of the Great Dividing Range in New South Wales, south of Bathurst addition, there is still an isolated occurrence in Woodend, north of Melbourne in Victoria.
Eucalyptus aggregata growing locally common in grassy, open woodland along water courses and on broad, cold plains, often with Eucalyptus rubida, Eucalyptus viminalis, Eucalyptus stellulata, Eucalyptus dives Eucalyptus pauciflora and. In the grassy undergrowth often Poa labillardieri and Joycea pallida is found in the woods. Also in sinks, where particularly long does the frost, and at an altitude of 700 meters with strong frosts and snow in winter comes Eucalyptus aggregata ago.
Today Eucalyptus aggregata only locally common, as most of its original distribution area was cleared and is now used for agriculture. Most of the still existing population of about 6300-8100 adult trees is scattered. Your seedlings can not prevail over the surrounding " weed " is. The hybridization with Eucalyptus viminalis and Eucalyptus dives threaten the continued existence of Eucalyptus aggregata. Climate change provides for an earlier warming of the frosty valleys, thrives in the Eucalyptus aggregata. The scientific committee of the "Department of Environment and Heritage of New South Wales " has the classification of Eucalyptus aggregata as "vulnerable " = " at risk " is proposed.
System
The first description of Eucalyptus aggregata was made in 1900 by Henry Deane and Joseph Maiden in Proceedings of the Linnean Society of New South Wales, Volume 24 (4 ), pp. 614 The type material has the caption " Wallerawang (HD ); Rydal (J. H. M. ); Jenolan Caves (W. Blakely ); near Orange, on the Cadia -road, Which remains is most western locality at present (RH Cambage ); Rockley and Burraga (R. H. C. ). It has not been recorded north of Sydney, and its southern localities are Nimbo Station, head of the Queanbeyan River, so Crookwell (HD) and Fagan's Creek, Braidwood district (Mr W. Bäuerlen, Communicated by Mr. RT Baker ) "on. The specific epithet is derived from the Latin word aggregata " aggregatus " for grouped, which refers to the fruit. A synonym for Eucalyptus aggregata H.Deane & Maiden is Eucalyptus rydalensis RTBaker & DDWM.
Eucalyptus aggregata forms with Eucalyptus viminalis and Eucalyptus dives natural hybrids.
Use
The wood of Eucalyptus aggregata is used exclusively for wood, and is very soft. Eucalyptus aggregata, however, grows in areas where thrive few other tree species, and serves with its dense crown as a good shade tree. The leaves are used as animal feed.