This name derives from the North Germanic “Dahl” meaning “valley”. The naming of the flower ”Dahlia“ itself has long been a subject of some confusion. Many sources state that the name "Dahlia" was bestowed by the pioneering Swedish botanist and taxonomist Carl Linnaeus to honor his late student, Anders Dahl, author of Observationes Botanicae. However, Linnaeus died in 1778, more than eleven years before the plant was introduced into Europe in 1789, so while it is generally agreed that the plant was named in honor of Dahl, who had died two years before, Linnaeus could not have been the one who did so.
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