Фитонимические номинации в говорах северо-восточной Польши: к мотивации семантики

The article is devoted to research of so-called exclusive isoglosses of the Belarusian- Polish areal community. The subject of studying is specificity of dialect names of a plantain skou̯ ojžak, skou̯ ojža, skou̯ ojźak noted in the north-eastern part of Poland. The purpose of the article is to find out reasons caused changes of semantic nature of mentioned dialect names and also to determine how intensively areal innovations skou̯ ojžak, skou̯ ojža, skou̯ ojźak were developing in Polish and connected with other Slavic languages.