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Dahlia merckii, Merck's dahlia, is a tuberous species of perennial flowering plant in the daisy family, Asteraceae. This herbaceous plant grows to 2.5 metres (8 feet) in height. It has divided leaves , and in late summer to autumn produces single flowers in shades of lilac, white, and pink.
There are 42 accepted species of flowering plants in the genus Dahlia, according to The Plant List. [1] The sectional classification of Dahlia sensu Sørensen (1969) [2] as updated by Saar et al. (2003) [3] and Hansen (2004) [4] and (2008) [5] is as follows (excluding infraspecific taxa);
The first plant was called Dahlia pinnata after its pinnate foliage; the second, Dahlia rosea for its rose-purple color. In 1796, from the parts sent by Cervantes, Cavanilles flowered a third plant, which he named Dahlia coccinea for its scarlet color. In 1798, Cavanilles sent D. pinnata seeds to Parma, Italy.
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The bulbs are produced to satisfy the demand for bulbs for parks, gardens and as house plants, in addition to providing the bulbs necessary for the production of cut flowers. The international trade in cut flowers has a worldwide value of approximately 11,000 million Euros, which gives an idea of the economic importance of this activity.
Dahlia 'Babylon Pink' is a branching, tuberous tender perennial cultivar with fully double pink blossoms. The flowers are as large as 8-10 in. wide (20–25 cm). This Dahlia belongs to the Decorative Dahlia classification and was introduced in the Netherlands by Fa Van Slageren in 1994.
Dahlias tend to attract quite a bit of insects, some which are dangerous and harmful to their survival. Insects like slugs, earwigs, the red spider, snails, caterpillars, aphids, and thrips threaten dahlias because they can eat the petals, leave slime trials, leave tattered petals, etc. Dahlias can also become infected with the following diseases: Sclerotinia disease, fungal diseases, mildew ...
'Bishop of Llandaff' is a cultivar of the dahlia, a garden plant. It is a branching, tuberous tender perennial with dark purple, almost black, foliage. This produces a stunning contrast with its scarlet flowers. [1]