Slovenia is among the European countries with the greatest amount of biodiversity that has not been sufficiently studied. Research achievements in the program Flora, Fauna and Vegetation of Slovenia and Neighbouring Regions include investigations of the flora, fauna and vegetation (recent and paleovegetation) of Slovenia and Central and South-Eastern Europe. The research group participated in multilateral and bilateral projects, published many papers in scientific journals and presented the results at conferences. Our results have thus become well integrated into common knowledge. In addition to advancing basic knowledge, our results are also important for legislation (various international conventions and directives) dealing with the protection of biodiversity and endangered ecosystems (FFH, natura 2000, Bern convention) and are used in applied work. The main results are enumerated according to these research topics: Floristic and taxonomy We dealt with horology of some taxa (e.g. Euphorbia kerneri, Thesium rostratum) and collaborated in the project Atlas Florae Europaeae. We investigated endemic and polymorfic taxa, such as Stellaria nemorum agg. and Cerastium sylvaticum agg.. We were also interested in the systematic, site conditions and horology of the Polygonum aviculare agg. Vegetation investigations Vegetation was investigated according to the standard Central-European method, in that new methodologies were integrated, such as measurement of site conditions, elaboration of large data sets, geographical information system, etc. The vegetation of some regions was extensively elaborated (e.g. Tolminsko). Some syntheses of vegetation of SE Europe were prepared (e.g. hornbeam forest, forest edge vegetation). The vegetation map of Slovenia with an explanatory text was prepared and published. Palynological investigations We dealt with investigations of the primary and secondary phases in the development of the Holocene vegetation and study of the spreading of individual forest elements, especially beech, from the South Alpine area to northern Europe after the last glaciation. With the antrocotomical and carpological research of the carbonised plant rests, which are radiocarbonically or archeologically dated, we studied this appearance and spreading of the cultural plants in Slovenia and more widely in Europe. Zoological investigations By use of x-ray diffraction the content of mollusc shells was studied. We also studied the mobility of snails. We investigated also the horology of beetles and discovered several new species for Slovenia. At the same time we introduced and adjusted new methodologies in the investigation of beetles. The ecology of population and horology of the endangered butterfly species Coenonympha oedippus was studies as a methodological approach for an endangered species.