Eucalyptus angustissima

Eucalyptus angustissima

Eucalyptus angustissima is a flowering plant within the myrtle family ( Myrtaceae ). She is originally from southern Western Australia, where it is called "Narrow -leaved Mallee ".

Description

Appearance

Eucalyptus angustissima grows in the habit of mallee eucalypts, this is a habit that is more shrub-like than tree-like, there are usually multiple strains available that form a Lignotuber; there are plant height usually 1-4 meters, rarely reaches up to 8 meters. Lignotuber are woody ridges that form at the base of the trunk and have "sleeping eyes ", this is an adaptation to bushfire, there may be the grove new cast. The light gray, light brown, orange and whitish mottled bark is smooth on the whole tribe and has no glands; there are sometimes bands available. The Mark of the branches no oil glands are present. Young specimens have round stems in cross section.

Sheet

In Eucalyptus angustissima is available Heterophyllie. The ever-changing continuously arranged on the branches leaves are stalked more than short (up to 2 mm).

The leaves of young specimens are at a length from 4.5 to 8 cm and a width of 0.3 to 0.4 cm, elliptic to ovate, straight, entire. The lowest youth leaves are dull bluish- green and the top glossy green.

The upright, glossy or matte, uniformly green colored and relatively thin leaves of adult specimens are at a length of (rarely to 5.5 ) 7 to 11.5 cm in length and a width from 0.15 to 0.3 (rarely to linear to narrowly lanceolate to 0.4 ) cm, crescent- shaped with tapering Spreitenbasis and acute or bespitztem upper end, and smooth edge. Only the median nerve is elevated, the lateral nerves and Netznervern are hardly recognizable. Dried leaves act furrowed. Oil glands are significantly or hardly recognizable in the intercostal fields.

Inflorescence and flower

In Western Australia the heyday of August extends until December or January. The pendant inflorescence is simple and doldig, and contains three to seven flowers. Of 0.2 to 0.4 cm Inflorescence stem has a narrow flattened or polygonal cross -section with a diameter of about 3 mm.

The stalked flowers are hermaphrodite, radial symmetry and cruciform with a double perianth. The egg-shaped flower buds are not floured or frosted. The sepals form an early sloping bald " calyptrata " or " operculum ", which is globose to conical, two to three times as long as the flower cups and stale than this. The flower cup ( hypanthium ) is bald. The flowers are white or cream-colored. The many stamens are bent in the flower bud inside. The elongated to kidney-shaped anthers öffenen to me a short, lateral slot. Three carpels are fused to a dreikammerigen ovary. Each placenta has four rows of ovules. The long, straight style ends in a more or less blunt scar.

Fruit and seeds

The stalked fruit is broad and flat with a diameter of 0.5 to 0.8 cm cup-shaped to clear or flat spherical and swollen below the rim at the level of discussion and three fruit compartments at the level of the rim. The tan seeds are flattened egg-shaped with more or less smooth upper surface with a length of 1.0 to 2.5 mm, sometimes grooved surface and one on the underside of the hilum.

Occurrence

The natural range of Eucalyptus angustissima is only in Western Australia, mainly in the municipalities of Esperance and Woodanilling.

In Western Australia Eucalyptus angustissima thrives on white or gray sand, clay, loam or sometimes saline soils, often on salt levels in salt pans or on sand hills.

System

The first description of Eucalyptus angustissima upon in 1862 by Ferdinand von Mueller in Fragmenta Phytographiae Australiae, Volume 3 (18 ), p 25 The type material has the caption: "Inter Promontoria Point Malcolm et Dover Point. Mxw "on. ; it was therefore collected in Western Australia, between Point Maxwell and Point Dover. The specific epithet is the Latin word angustissima increasing angustus for narrow and refers to the leaves, it is the narrowest of all older eucalypts.

Previously there were two subspecies, but Eucalyptus angustissima subsp. quaerenda LASJohnson & KDHill got by Margaret Byrne in Recognition of Eucalyptus quaerenda ( Myrtaceae ) at specific rank. In: Nuytsia, Volume 15, 2004, p 321 the rank of a species Eucalyptus quaerenda ( LASJohnson & KDHill ) Byrne.

Eucalyptus angustissima is standard Angustissimae the subsection Destitutae from the section Bisectae in the subgenus within the genus Eucalyptus Symphyomyrtus. Together, these kinship group, the Y-shaped cotyledons ( cotyledons ) and the absence of oil glands in the pith of the branches.