Sweet Caroline
by Lingfai Leung
Title
Sweet Caroline
Artist
Lingfai Leung
Medium
Photograph - Photographs
Description
The dahlia is a flower of many forms, the master of flower disguise and indeed continues to evolve with new developments around 2006.
In order to help identify the many varieties that have existed, attempts have been made to identify characteristics that would allow the flowers to be categorized. This process formed the basis for classification.
In the early days, most dahlias were species types and single flowered. They were mainly grown by botanists in Europe who identified them by their species names. Eventually hybrids appeared to give rise to Dahlia variabilis, and this began to give rise to identification problems as some flowers now had several rows of "petals". As a member of the Compositae, the dahlia flower is comprised of disc and ray florets, each a flower in its own right, although most horticulturists describe them as petals of the dahlia flower. Once double and semi double forms appeared, other breaks in formation also arose including the pompon type (like the pompon on the top of a sailor's hat) and the collerette type.
By 1900, a few different types were recognized, based on overall shape or colour. Cactus, pompon, single, show and fancy were included in an NDS Guide of varieties in 1904.
During the 1900's more types appeared and by 1950, provisional classifications were possible, but these differed from country to country.
In 1962, at the International Horticultural Congress in Brussels and subsequently at the Congress in Maryland in 1966 an international group of botanists and dahlia lovers (supported by the British, Dutch and American Dahlia Societies) got together to find a way of classifying dahlias in a way that was acceptable to all, and would last for all time.. In order to do this, major and minor characteristics were identified, and classification became a relatively simple matter. This was published in 1969 by the RHS, who had been appointed as the International Registration Authority for Dahlias. To this day, the International Registrar holds a list of all registered dahlias along with much information about them, and in 2003 it holds some 18000 different cultivars.
Edited from http://www.dahliaworld.co.uk/dahlia.h
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�2013 Lingfai Leung. All rights reserved
Uploaded
October 4th, 2013
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