Yıldız Çiçek Grubu Fotoğraflar, Resimler ve Videolar Payla

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About Yıldız Çiçek Grubu Fotoğraflar, Resimler ve Videolar Payla

Yıldız çiçeği, Asteraceae familyasından Dahlia cinsini oluşturan yaz ve sonbahar mevsiminde çiçek açan, gövdesi çalı, kökleri yumru şeklinde bitki cinsi. Anavatanı Meksika olup bu ülkenin ulusal çiçeği olarak kabul edilmektedir.

İspanyollar tarafından ilk olarak Meksika dağlarında bulunmuştur. 1872 senesinde bir kutu yıldız çiçeği Meksika'dan Hollanda'ya gönderilmiştir. Sadece tek bir bitki bu yolculukta canlı kalabildi.

Yıldız çiçekleri bazı kelebek (Lepidoptera) türlerinin larvaları tarafından besin olarak tüketilmektedir.

Yıldız çiçeğinin bilimsel adı Dahlia, 18. yüzyıl İsveç botanikçisi Anders Dahl adından gelmektedir. Yıldız çiçeği Washington Eyaletinin başkenti Seattle'nin resmi çiçeğidir.
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Dahlia is a genus of bushy, tuberous, perennial plants native to Mexico, Central America, and Colombia. There at least 36 species of Dahlia. Dahlia hybrids are commonly grown as garden plants. The Aztecs gathered and cultivated the dahlia for food, ceremony, as well as decorative purposes [1], and the long woody stem of one variety was used for small pipes.

In 1872 a box of Dahlia roots were sent from Mexico to the Netherlands. Only one plant survived the trip, but produced spectacular red flowers with pointed petals. Nurserymen in Europe bred from this plant, which was named Dahlia juarezii with parents of Dahlias discovered earlier and these are the progenitors of all modern Dahlia hybrids. Ever since, plant breeders have been actively breeding Dahlias to produce thousands of cultivars, usually chosen for their stunning and brightly coloured flowers. Dahlia plants range in height from as low as 12" (30cm) to as tall as 6-8 feet (180-240cm). The flowers can be as small as 2" (5 cm) or up to a foot (30 cm) in diameter. The great variety results from Dahlias being octoploids (they have eight sets of homologous chromosomes, whereas most plants have only two).

Dahlias are used as food plants by the larvae of some Lepidoptera species including Angle Shades, Common Swift, Ghost Moth and Large Yellow Underwing.

The dahlia is named after Swedish 18th-century botanist Anders Dahl. Until recently they were also named in Germany as "georgine" by the botanist Carl Ludwig Willdenow, after the naturalist Johann Gottlieb Georgi of St. Petersburg.

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