The main function of a flower is reproduction, which, before the evolution of the flower and angiosperms, was the job of microsporophylls and megasporophylls A flower can be considered a powerful evolutionary innovation, because its presence allowed the plant world to access new means and mechanisms for reproduction Flowering plants are also commonly grown for decorative purposes, with certain flowers playing significant cultural roles in many societies The fossil history of flowering plants records the development of flowers and other distinctive structures of the angiosperms, now the dominant group of plants on land. Plant evolution is the subset of evolutionary phenomena that concern plants Evolutionary phenomena are characteristics of populations that are described by averages, medians, distributions, and other statistical methods.
The first classification was published in russian in 1954, and came to the attention of the rest of the world after publication of an english translation in 1958 as origin of angiospermous plants Further versions appeared in 1959 (die evolution der angiospermen) and 1966 (sistema i filogeniia tsvetkovykh rastenii) [1] the latter popularised takhtajan's system when it appeared in english in. The cretaceous terrestrial revolution (abbreviated ktr), also known as the angiosperm terrestrial revolution (atr) by authors who consider it to have lasted into the paleogene, [1] describes the intense floral diversification of flowering plants (angiosperms) and the coevolution of pollinating insects (especially anthophilans and lepidopterans.
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