Dahlia is a genus of bushy, tuberous, perennial plants native to Mexico,
Central America, and Colombia. There are at least 36 species of dahlia.
Dahlia hybrids are commonly grown as garden plants. The
Aztecs gathered
and cultivated the dahlia for food, ceremonies, as well as decorative
purposes, and the long woody stem of one variety was used for small
pipes.
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 . In
German the dahlia was known during most of the 19th century as Georgia,
being named after the naturalist
Johann Gottlieb Georgi of
St.
Petersburg, Russia. (sourse - http://en.wikipedia.org/wiki/Dahlia ).
Dahlia plants range in height from as low as 12 in (30 cm) to as tall as
6–8 ft (1.8–2.4 m). The flowers can be as small as 2 in (5.1 cm) in
diameter or up to 1 ft (30 cm) ("dinner plate").
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