Ecological, plant geographical and morphological considerations on the genus Anthriscus Pers. - Analysis of the ecological, plant geographical and morphological characteristics of the genusAnthriscushas shown that his diffusion on broad geographical areas stays in connection with the transition of the single entities from the natural habitats to those semi-natural and synantropic. This passage is accompanied by a lowering of the inferior altitudinal limit of the distribution of the single species. In this genus has been observed a reduction series regarding the duration of the life cycle (from perennial herbs to biennal and annuals) and the size of the vegetative and reproductive apparatus.