Eucalyptus tricarpa
Eucalyptus tricarpa
Eucalyptus tricarpa is a flowering plant within the myrtle family ( Myrtaceae ). It occurs in central and southeastern New South Wales and to the east, the south and in the center of Victoria before and is there " Ironbark " or " Red Ironbark " called.
Description
Appearance and leaf
Eucalyptus tricarpa grows as a tree reaching heights of growth of up to 35 meters. The bark remains on the entire tree is reddish brown to brown - black furrowed and deep. The bark of young branches is green. Neither in the marrow of the young branches still in the bark, there are oil glands.
In Eucalyptus tricarpa is available Heterophyllie. The leaves are always divided into petiole and leaf blade. The on top and bottom slightly different colored green or gray - green leaf blade lanceolate to ovate of seedlings is at a length of 4 to 9.5 cm and a width of 1.5 to 4 cm. In young specimens the dull green or on top and bottom of the same color gray - green leaf blade is broad - lanceolate with a length of 9.5 up to 17 cm and a width of 3 to 5 cm to ovate. At middle-aged specimens, the leaf blade is at a length of 11-21 cm and a width of 2 to 3.5 cm lanceolate, broadly lanceolate or ovate, straight, entire, dull and green. The petioles of adult specimens are narrow flattened or channel-shaped with a length of 13 to 25 mm. The leaf blades of adult specimens with equal colored matt green upper and lower sides are lanceolate with a length of 9 to 22 cm and a width of 1 to 2.4 cm, relatively thick, curved like a sickle, taper towards the Spreitenbasis and have a pointed top end. The raised lateral nerves go at large distances from an acute angle from the midrib. The cotyledons ( cotyledons ) are wrong - kidney-shaped.
Inflorescence and flower
End or pendant on a 5 to 17 mm long in cross section terete or angular inflorescence stem are only about three flowers in simple inflorescence. The flower stems are terete or angular with a length of 10 to 18 mm. The non- blue-green floured or frosted flower buds are egg -, club- or short spindle-shaped with a length of 10 to 14 mm and a diameter of 5 to 7 mm. The sepals form a calyptra, which remains available until flowering ( anthesis ). The smooth calyptra conical or beaked, shorter than or as long as the smooth flower cup ( hypanthium ) and as wide as this one. The flowers are white, pink, cream or red. The outer stamens are infertile ( infertile ), the anthers cubic. The flowering period extends from May to October.
Fruit and seeds
The fruit is globose stalked at a length of 10 to 14 mm and a diameter of 10 to 15 mm, hemispherical, ovoid or urn- shaped, four-, five - or sechsfächrig. The disc is pressed, the fruit trays are included.
The brown or gray seed is ovate or ovate compressed. The hilum is centered.
Occurrence
The natural range of Eucalyptus tricarpa is the southern coast of New South Wales south of Araluen and the east, the south and the center of Victoria.
Eucalyptus tricarpa is locally common in dry sclerophyll forest or open woodland on moderately fertile before, flat bottoms.
System
The first description was in 1962 by Lawrence Alexander Sidney Johnson as a subspecies ( basionym ) Eucalyptus sideroxylon subsp. tricarpa LASJohnson of Eucalyptus sideroxylon under the title Studies in the Taxonomy of Eucalyptus in Contributions from the New South Wales National Herbarium, Volume 3, Issue 3, pp. 122 The type material has the caption " Tilba Tilba to Wallaga Lake, NSW, LAS Johnson 20/11/1950 (NSW 54090 ), and fruiting " flowering on. LASJohnson and KDHill 1991 gave her the rank of a species Eucalyptus tricarpa ( LASJohnson ) LASJohnson & KDHill under the title Systematic studies in the Eucalypts. 3 New taxa in Eucalyptus ( Myrtaceae ) in Telopea, Volume 4, Issue 2, p 247 The specific epithet is derived from the Latin words tricarpa " tri" for three and " carpas " for fruit and has the dreiblütigen inflorescence ( and dreifrüchtigen fruit stand ) back.
Since 2004 there are two subspecies of Eucalyptus tricarpa ( LASJohnson ) LASJohnson & KDHill:
- Eucalyptus tricarpa subsp. decora Rule: This subspecies was published by K. Rule in Muelleria, Volume 20, 2004, p 27.
- Eucalyptus tricarpa ( LASJohnson ) LASJohnson & KDHill subsp. tricarpa
There are natural hybrids of Eucalyptus and Eucalyptus tricarpa bosistoana.
Use
The heartwood of Eucalyptus tricarpa is dark, very hard and extremely resistant. It has a specific gravity 910-1220 kg / m³. On the Red hard wood, the common name "Red Ironbark " refers. The wood of Eucalyptus tricarpa is used for railroad ties and other heavy structures.