Silk tree
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Silk tree ( Albizia julibrissin ) |
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The silk tree ( Albizia julibrissin ) (also Silk Tree or sleeping tree because it collapses its leaves at night or in drought, so "sleeps") is a plant from the genus Albizia that the subfamily of Mimosa Family (Mimosoideae) within the family of legumes (Fabaceae ) heard.
Naming
The silk tree got its name because of its many silky, creamy white, light to dark pink stamens ; they are most noticeable on these flowers. This is also indicated the specific epithet julibrissin , a reproduction of the Persian gole Abrisham (گل ابریشم), translated into German as "silk flake" or "silk flower". The generic name Albizia refers to Filippo degli Albizzi , a nobleman from Florence who was the first to bring the plant to Europe via Constantinople in 1749 , which is why it is also known in French as Acacia de Constantinople or Mimosa de Constantinople .
In Persian and Japanese , the plant also has names that indicate the property that the leaves close at night and open again at dawn, in Persian Shabkhosb (شبخسب, "night sleeper") and Japanese Nemunoki ("sleeping tree").
description
Albizia julibrissin grows as a deciduous shrub or tree . Under ideal circumstances, the tree can reach a height of 6 to 8 meters. The bark is dark gray. The bark on young twigs has yellowish-brown hair. The silk tree is short-lived and rarely gets older than thirty years. The treetop is broad and flat arched.
The alternate and stalked leaves are 20 to 30 cm long and bipinnate with 4 to 15 pairs of more or less sessile first-order pinnacles. The first-order leaflets each having 10 to 30 pair pinna leaflet second-order, having a length of 7 to 15 cm. The underside of the sickle-shaped and 5 to 18 mm long and about 3 to 7 mm wide leaflets is hairy along the midrib. The stipules are 7 to 8 mm long.
The spherical, head-shaped inflorescences, which are arranged singly or in twos or threes, stand on a 3.5 to 7 cm long inflorescence stem and have a diameter of 2.5 to 3 cm. The bract is about 3 to 6 mm long. The flower stalk is about 1 to 2 mm long. The flowers are hermaphroditic. The sepals are fused into a 3 to 4 mm long tube with only short calyx teeth. They only have receded, overgrown petals that are only 7 to 8 mm long and hairy on the outside. The 2.5 to 3.2 cm long stamens are fused into a tube; it is about as long as the corolla tube.
The legume, which is hairy until ripe and finally light brown or yellowish, is 7.5 to 12.5 cm long and about 1.5 to 2.5 cm wide. It contains eight to twelve seeds.
The number of chromosomes is 2n = 26.
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Dissemination and use
In the genus of Albizia , Albizia julibrissin is the species that is most widespread in temperate climates. This tree species is hardy to around −15 ° C. The silk tree is widespread from Iran to eastern China .
In North America, the silk tree is used as an ornamental plant in parks and gardens. In some states this species is feral as a garden refugee and is one of the invasive neophytes .
swell
- Albizia julibrissin at Flora of Pakistan at efloras.org (accessed March 12, 2016)
- Albizia julibrissin at Plants For A Future (accessed March 12, 2016)
Individual evidence
- ↑ Antonio Durazzini: Memoria sull'albero detto volgarmente Julibrissin letta in di 5 agosto 1772 nella Societa dei Georgofili . In: Magazzino toscano , 1772, vol. 1, pp. 1-14.
- ↑ cf. Albizia Julibrissin. Botanic thesaurus, Arthemis database (English).
- ^ Albizia julibrissin at Tropicos.org. In: IPCN Chromosome Reports . Missouri Botanical Garden, St. Louis
Web links
- Albizia julibrissin on Plants For A Future (English)
- Silk tree ( Albizia julibrissin ) on Baumkunde.de
- Sleeping tree, silk acacia in the Mainz Botanical Garden