At the centre of the flower are the ‘disc florets’, which are typically yellow. The individual dahlia flowers are called ‘florets’ and there are two different kinds. This explains why the Asteraceae family was formerly known as Compositaea. Asteraceae plants typically have a flower head, or capitulum, that is a composite of a number of smaller individual flowers. The different groups are set out below, but in order to understand the differences between the various groupings, it is useful first to understand something about the parts of dahlia flowers, since it is the flower characteristics that determine the groupings.ĭahlia is a genus within the Asteraceae family, whose members also include daisies, sunflowers, rudbeckia and the like.
According to the NDS, the different types of dahlias can currently be divided into 15 groups. These group are classified according to the characteristics of their flowers.Įven this grouping system is not straightforward, as there can be sub-divisions within the groupings and International approaches can differ somewhat.įor these purposes, I’ll focus on the approach of the UK’s National Dahlia Society (NDS). Order is imposed on the complexity of dahlia varieties by the arrangement of different dahlia varieties into groups. Dahlia varieties grouped by flower characteristics Thus, the dahlia landscape is both complex and continually changing, so classification of the different varieties of dahlias is not straightforward. Botanists argue about the division of species, and growers create increasing numbers of cultivars and varieties. The classification of types of dahlias (or varieties) is a fluid subject. More on Dahlias Complexity of Dahlia varieties.Smaller Dahlia varieties – size classifications.Dahlia varieties grouped by flower characteristics.Images of the Different Dahlia Varieties.Left to Right: Single flowered, Anemone flowered and Collerette dahlias Left to Right: Waterlilly, Formal decorative and Ball dahlias Sponsored Links Left to Right: Pompon, Cactus and Semi-Cactus dahlias Left to Right: Miscellaneous, Fimbriated and Star dahlias Sponsored Links Left to Right: Double Orchid, Paeony and Stellar dahlias Here you can identify the 15 main groups of dahlias from the pictures below. This amount of variety within the dahlia genus means there is a huge range of colours and shapes of dahlia flowers: there are single dahlias – those with a simple array of petal around a central disc, pompon and ball dahlias with their complex geometric shapes, cactus dahlias, and many more. This is not surprising since there are about 30 dahlias species and 20,000 different dahlia cultivars. If you are interested in growing dahlias, for your garden or for cut flowers, it is not always easy to understand all the different dahlia varieties that are available. Pinterest Images of the Different Dahlia Varieties.
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