The spontaneous vascular flora of Trieste (NE-Italy).

摘要

The annotated check-list of the spontaneous vascular flora of the town of Trieste comprising 1025 taxa is presented. Among the 113 families present, Asteraceae, Poaceae, Fabaceae, Lamiaceae, Brassicaceae, Rosaceae, Caryophyllacae, Apiaceae, Scrophulariaceae, Cyperaceae and Euphorbiaceae are the most common. Particularly important species are Atriplex micrantha, Lepidium latifolium subsp. latifolium, Lathyrus ochrus, Teline monspessulana, Campanula persicifolia subsp. sessiliflora, Eragrostis virescens, Eleusine tristachya and Pimpinella peregrina, which is new for the flora of Friuli-Venezia Giulia region (North-eastern Italy). According to Wittig et al. (1985), urban flora can be divided into three main distribution patterns: urbanophob, urbano-neutral and urbanophil. The biological spectrum of the urban flora, where hemicryptophytes and therophytes prevail, is discussed and compared with that of the north Adriatic Karst, as well as the chorological spectrum, where the mediterraneous chorotype prevail. The composition and the origin of the anthropochore species is also commented. The richness of the urban flora of Trieste (about 1/3 of the whole flora of the Friuli-Venezia Giulia region) is related to the geographical position of the town, to its urban texture and to its importance as a trade centre. Finally, a list of historical findings is reported and discussed: at present 283 taxa, especially belonging to the genera Chenopodium (incl. Blitum), Silene, Trifolium, Vicia, Lathyrus, Melilotus, Medicago, Euphorbia, Bupleurum, Tordylium, Caucalis and Galium, have not been confirmed..