Feather grass (Stipa pennata L., Poaceae Barnh.) on the northern border of its natural area in Nizhegorod region

The article touches the problem of borders plant species natural areas. purpose is analysis spreading Stipa pennata L. ( Poaceae Barnh.) by means comparison configuration north border in Nizhegorod region with physical-geographic borders, soils, vegetations, climate and economical activity population. Noted, that (approximately 56° N.L.) are defined soil-edaphic conditions (chernozem, gray forest soil, moderate moisture warm climate), vegetation this surrounding regions areas after deforestation . Forest degradation creates favorable phytocenosics for Stipa. This approximately coincidence part General Landscape Border Russian plane on region. It was ascertained, location slopes bank Volga River might be explained local micro-climate. In these places, spring late new sprouts plants emerged later frosts.