Natural habitats of typical plants growing on ruins of Roman archaeological sites (Rome, Italy)

In this study, we support the hypothesis that wall plant species come mainly from rocky habitats, taking into account that ancient walls show similar characteristics to rocks. The occurrence of wall species in natural habitats was investigated. The main literature concerning wall and natural vegetation of central-southern Italy was viewed. Vegetation synoptic tables were analysed through statistical procedures for comparing the occurrence and behaviour of wall species in ruderal habitats as archaeological sites and natural ones.