Double flower

Definition and stakes

Anthony Florian Madinger Willich,  Domestic Encyclopædia (1802)

“ The origin of double flowers is believed to result from the luxuriant growth of the plant, in consequence of excessive nourishment, moisture, and warmth: they arise from the increase of some parts of the flower, and the consequent exclusion of others. As they present a greater blaze of colour in a small space, and continue in bloom for some weeks longer than single flowers, the method of producing them from seeds is a matter of importance. ”
Source: Wikisource

Portrait of Hugo de Vries Hugo de Vries,  Species and Varieties, Their Origin by Mutation

“ Bad weather increased the number of poorly filled flower-heads, while warm and sunny days were productive of beautiful double flowers. The heads that are borne by strong branches have a greater tendency to become double than those of the weaker ones, [508] and towards the autumn, when all those of the first group are faded away, and only a weak though large section of the heads is still flowering, the whole aspect of the variety gradually retrogrades. ”
Source: Gutenberg

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