Contributo alla conoscenza floristica della Campagna Romana: il Vallone di Ponte Lupo (Roma)

""Contribution to the floristic knowledge of the Campagna Romana: the area of the Valley of Ponte Lupo. The present work on the flora of Valley of Ponte Lupo (Rome) fits into the broader context of the floristic knowledges of the territory of the Campagna Romana. The taxa recorded are 448 belonging to 80 families and 308 genera. These data highlight a good floristic richness of the site, mainly due to the presence of different habitat. Among the entities collected, there are some of interest as endemic species at national level (Astragalus pelecinus subsp. pelecinus, Centaurea deusta subsp. deusta, Crepis bursifolia, Drymochloa drymeja subsp. exaltata, Erysimum pseudorhaeticum, Linaria purpurea) or rare at regional level (Astragalus pelecinus subsp. pelecinus, Chenopodium hybridum, Leontodon saxatilis subsp. saxatilis, Thalictrum minus subsp. minus). Others are included in LR 61\\\/1974 (Biarum tenuifolium subsp. tenuifolium, Linaria purpurea, Polygonum romanum, Styrax officinalis, Staphylea pinnata) or also in the regional red lists of IUCN (Staphylea pinnata). The structural analysis shows the high prevalence of the therophytes and hemicriptophytes, although the accentuated steepness of certain sectors of the area allowed to the preservation of a good percentage of phanerophytes. Chorologically, the Euroasiatic and Mediterranean types are the most represented, according to the character of bioclimatic transitionality of the Campagna Romana, although the percentage of the multizonal species is relatively high, linked to a certain degree of human disturbance for agro-pastoral, cutting activities, and anthropic frequentation of the site.""