Acacias

The acacia trees (Albizia) is a genus of the subfamily of Mimosa. Other German names are silk acacia tree Albizi or sleep. They are closely related to the acacia.

A kind of Acacia tortilis, which does not belong to the genus Albizia, is also known as acacia, but it belongs to the genus Acacia. The botanical genus name honors the Italian naturalist Filippo degl'Albizzi (from the 18th century).

Description

Albizia species are deciduous trees and shrubs that grow most rapidly. You do not have thorns. The leaves are pinnate twice. Stipules are present.

Acacias have autonomous leaf movements on the basis of Turgorbewegungen. There are circadian, in the vernacular as a movement sleep, described movements of the leaflets.

These fold up in about 12 hours, the day-night rhythm and appropriate distance each evening Fieder and open it again in the morning.

The flowers are together in little head or brush-stalked flowers. There are flowering stems present or absent. The flowers are hermaphrodite. The sepals are fused with a maximum short calyx lobes, which usually are visible only as a calyx teeth.

The petals are fused to funnel their mid out. The white, pink and rarely purple stamens are fused at least at their base, they often form a Staminalröhre. The anthers are small. The thin pencil ends up in a kopfigen tiny scar. The pulses are thin, strap-shaped. The egg-circular seeds are pressed together.

Use

Among the species of this genus Albizia julibrissin is, the silk tree, the kind that is most widespread in the temperate zones. This tree can tolerate temperatures down to -30 degrees.

In the Mediterranean, and North America it is cultivated as an ornamental and occasionally confused with mimosa. In central areas is the way, together with Albizia lophanta as hardy ornamental container plant.



Source: http://de.wikipedia.org/wiki/Schirmakazien

See Also: International Flower Delivery, Florist