Eucalyptus haemastoma

Eucalyptus haemastoma

Eucalyptus haemastoma is a flowering plant within the myrtle family ( Myrtaceae ). It occurs only in the central coast of New South Wales, where it is " Scribbly Gum", "Broad- leaved Scribbly Gum", "White Gum" or " Snappy Gum" called.

Description

Appearance and leaf

Eucalyptus haemastoma grows as a tree reaching heights of growth of up to 15 meters. The bark is smooth on the whole tree with scribbling, white, gray or yellow and peels off in short ribbons. The young branches have green bark. Neither in the marrow of the young branches still in the bark, there are oil glands.

In Eucalyptus haemastoma is available Heterophyllie. The leaves are always divided into petiole and leaf blade. The stems are small flattened or channel-shaped with a length of 10 to 20 mm. In young specimens the leaf blade is ovate and dull gray - green. In middle-aged specimens, the leaf blade is at a length of about 22 cm and a width of about 8 cm ovoid, curved like a sickle, entire and dull gray - green. The on upper and lower sides of the green the same color shiny or gray - green leaves on adult specimens are at a length of 12 to 15 cm and a width of 1.5 to 4 cm wide, lanceolate, relatively thick, curved like a sickle, taper towards the Spreitenbasis back and have a pointed upper end. The barely visible lateral nerves go in average distances from an acute angle at large distances from the median nerve. The cotyledons ( cotyledons ) are kidney-shaped.

Inflorescence and flower

Constantly on a page at a length of 12 to 25 mm and a width of up to 3 mm in cross section, narrow flattened or angular inflorescence stem are in a simple inflorescence eleven or more flowers together. The 3-6 mm long flower stems are terete. The non- floured blue green or frosted flower buds are ovoid or club-shaped with a length of 6 to 8 mm and a diameter of 4 to 5 mm. The sepals form a calyptra, which remains available until flowering ( anthesis ). The smooth calyptra is hemispherical or conical, as long as the smooth flower cup ( hypanthium ) or shorter and narrower than this. The outer stamens are infertile. The flowers are creamy white or yellow.

Fruit

The stalked fruit is conical, with a length and a diameter of 6-9 mm or pear-shaped and vierfächerig. The disc is flat or slightly raised, the fruit trays are included or available on the height of the rim.

Occurrence

The natural range of Eucalyptus haemastoma is the middle part of the coast of New South Wales to Sydney and Newcastle, from Lake Macquarie to the Royal National Park.

Eucalyptus haemastoma grows locally common in dry sclerophyllous forests on shallow, infertile sandy soils over sandstone.

System

The first description of Eucalyptus haemastoma was made in 1797 by James Edward Smith, entitled Botanical character of Some Plants of the Natural Order of Myrti in Transactions of the Linnean Society of London, Volume 3, page 286. Synonyms of Eucalyptus haemastoma Sm are Eucalyptus haemastoma Sm subsp. haemastoma and Eucalyptus haemastoma Sm var haemastoma.

Intergradationen with Eucalyptus racemosa were observed mainly south of Sydney. Natural hybrids forms Eucalyptus Eucalyptus piperita haemastoma subsp. piperita, Eucalyptus umbra and Eucalyptus camfieldii. In "Australian Plant Name Index" a variety is mentioned as hybrids: Eucalyptus haemastoma var × montana H.Deane & Maiden.