Contribution to the knowledge of flora and vegetation of Krissi islet (Crete, SE Mediterranean sea).

The results of a floristic and vegetational investigation on the Aegean islet of Krissi are presented. Its vascular flora numbers 172 taxa (species, subspecies and hybrids), 92 of which are new records. A species new to science, Limonium chrissianum, is described and illustrated and two new combinations, Limonium roridum and Teucrium dumulosum, are proposed. Furthermore, an iconography of the fruited Bupleurum gaudianum, a rare endemic known up to now only from the islet of Gaudos is provided. The phytosociological analysis identifies 8 associations, including relevés of maquis, phrygana, salt marshes, psammophilous and rupicolous vegetation. The observed association, six of which are here described for the first time, are outlined from the floristic, ecological and chorological point of view. Besides, a new alliance, Cichorio-Limonion roridi, is described.