Taxonomic diversity of Brassicaceae in the Samara-Ulyanovsk Volga Region

In the flora of Samara-Ulyanovsk Volga region, Brassicaceae family is one leading ones. It interest to study composition genera this at level territory entire as well physiographic regions included in it. helps understand whether there are local features cruciferous and what they are. Two natural zones distinguished area: forest-steppe steppe; four provinces 15 physical-geographic regions. paper, we consider more detail 7 floras, described most fully. All them located zone. spectra families considered regions, on 4th5th place. spectrum adventive fraction flora, it rises 2nd3rd position, native falls 7th9th The complete plants throughout region contains 40 89 species. not possible unambiguously single out head part generic spectrum, concentrating itself a significant species family. numerous Rorippa, Lepidium Alyssum. representation these genera, those slightly smaller weight (Cardamine, Erysimum Sisymbrium), does differ An exception genus Alyssum, whose representatives confined limestone chalk substrates, which common all areas. has fairly wide ecological spectrum; includes that grow different ecotopes.