Phytogeochemical, geographical and vulnerability study of the Paleosubtropical element Notholaena marantae subsp. marantae (Sinopteridaceae) at the western edge of its range

摘要: Serpentine outcrops are distinct from their background geological context, as they often isolated one another, and provide a home to significant number of rare or endemic taxa. The aim this study was assess the Portuguese populations such taxon, Notholaena marantae subsp. marantae, including information on its biogeography, habitat, geographical range conservation status. A detailed also made association Notholaenetum member Phagnalo saxatilis-Cheilanthion maderensis alliance, type vegetation included in EU Habitats Directive 92/43/ECC. distribution highly fragmented, with two sites accounting for over 50% total individuals recorded. presence N. is associated that ultramafic rocks, which show specific geochemical features. status species cause concern. We propose be considered ‘vulnerable’ according criteria IUCN (2001), areas where grow protected. This confirms Portugal importance serpentine habitats.