Ellenberg’s Indicator values for the Flora of Italy – first update: Pteridophyta, Gymnospermae and Monocotyledoneae

Ellenberg’s indicator values are an useful tool to delineate the relationship between plants andenvironment, recognising to each species a functional role as biological indicator. In the frameof the second edition of the Pignatti’s “Flora d’Italia”, some new informative systems are underpreparations, in order to support geobotanical/applied studies, including a complete and updatedreview of the Ellenberg’s indicator values for the whole bulk of species mentioned in theflora of Italy. This first contribution includes a list of 380 species of Pteridophyta,Gymnospermae and Monocotiledoneae that complete the first assignment of the Ellenberg’sindicator values to the flora of Italy, published in 2005. Besides, some methodological considerationson the attribution and the use of Ellenberg’s indicator values are reported.