The General Collection of the KTU Herbarium includes mostly plants from Poland, documentation of the Flora of Upper Silesia and adjacent areas, as well as protected and endangered plant species in Poland; alien invasive species, kenophytes and ephemerophytes of Poland and plants of metal-bearing habitats in Poland and Europe. The geographical area of origin of the collections of KTU Herbarium is mainly Poland and Europe, but also North and South America and Africa, Asia (Siberia, Middle East), as well as Australia and the Arctic. The oldest collections come from the 19th century (1880-1890).