Eucalyptus microcorys

Eucalyptus microcorys

Eucalyptus microcorys is a flowering plant within the myrtle family ( Myrtaceae ). It occurs in central and northern coast of New South Wales as well as in the neighboring southern coast of Queensland and is there called "tea" or " Tallowwood ".

Description

Appearance and leaf

Eucalyptus microcorys grows as a tree, the growth heights of up to 40 meters, sometimes up to 60 meters, is reached. The bark remains on the entire tree is reddish brown or brown -black and fibrous with micaceous spots. 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 microcorys is available Heterophyllie. The leaves are always divided into petiole and leaf blade. The on top and bottom slightly different color green leaf blade of seedlings is ovoid, with a length from 4.5 to 7 cm and a width of 2 to 3.3 cm. In young specimens the leaf blade is ovate and at top and bottom in different colors shiny green with a length of 7 to 11 cm and a width of 3 to 5 cm. At middle-aged specimens, the leaf blade is elliptic to ovate, straight, entire and shiny green with a length of 8.5 to 15 cm and a width of 2.5 to 4 cm. The petiole of adult specimens ist6 to 18 mm long and narrow flattened or channel-shaped. The on top and bottom in different colors shiny green leaf blade of adult specimens is lanceolate with a length of 8 to 13 cm and a width of 1.5 to 2.5 cm, relatively thin and tapering to the Spreitenbasis. The leaf blade may be straight or curved like a sickle and its upper end can be acute or acuminate. The raised lateral nerves go from average distances at an obtuse angle from the midrib. The cotyledons ( cotyledons ) are kidney-shaped.

Inflorescence and flower

End or side groups are often several at the end of the branches, at one with a length of 6 to 18 mm in cross section, narrow flattened or angular inflorescence stem simple inflorescences, containing seven to eleven flowers. The flower stems are terete or angular with a length of 2 to 6 mm. The flower buds are floured clavate and not blue-green, with a length of 4 to 6 mm and a diameter of 2 to 3 mm or frosted. The sepals form a calyptra, which is maintained until flowering ( anthesis ). The smooth calyptra with four seams is hemispherical, shorter than or as long as the smooth or slightly ribbed flower cup ( hypanthium ) and as wide as this one. The flowers are white or off- white. The flowering period extends from August to December.

Fruit and seeds

The stalked fruit is conical with a length of 5 to 9 mm and a diameter of 4 to 6 mm, pear-shaped, or inverted conical, finely ribbed or striped and three, sometimes vierfächrig. The disc is pressed in, the fruit bins are more or less at the height of the edge.

The yellow- brown seed is ellipsoidal and has a honeycomb-like structure. The hilum is centered.

Occurrence

The natural range of Eucalyptus microcorys is the central and northern coastal region of New South Wales including the hinterland, mainly north of Sydney, and subsequent southern coastal region of Queensland to Rockhampton in the north.

There is also a singular occurrence in the southwest of Western Australia. This occurrence in self County Augusta- Margaret River in the South West region but is considered atypical. The local copies with rough, gray bark reach stature heights between 5 and 12 meters. Eucalyptus microcorys is drought and frost resistant.

Eucalyptus microcorys is very common in moist woods and edges of rain forests, often on slopes, in front of moderately to very fertile soils. The population in Western Australia can be found on brown loam over laterite and clay soils at a clear secondary forest and along watercourses.

Taxonomy

The first description of Eucalyptus microcorys was in 1860 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae, Volume 2 (12 ), p.50 The type material has the inscription " In silvis ad flumina Hastings et McLeay River. Dr. Beckler. Ad flumen Brisbane. F. M. "on. The specific epithet microcorys micros for small and composed corys for helmet or cap of the ancient Greek words and refers to the calyptra.

Use

The heartwood of Eucalyptus microcorys is yellow - brown with a slight greenish tint, oily appearance and extremely resistant. It has a specific gravity of 875-1065 kg / m³. The wood of Eucalyptus microcorys is used as a heavy timber for the production of poles, railroad ties, cross-ties, floors and decks. It is considered one of the best native hardwoods in New South Wales.