“…As a result of recent flora research in Hungary, several alien plant species previously unknown to the country have been detected (SOMLYAY 2009, KORDA 2013, KIRÁLY and HOHLA 2015, KORDA 2014, KIRÁLY 2016, BALOGH and MESTERHÁZY 2017, TÖRÖK and ARADI 2017, CSIKY et al 2018, KIRÁLY and KIRÁLY 2018, KORDA et al 2018, RIEZING 2019. In other cases, the expansion of exotic species has been reported (LENGYEL 2013, LENGYEL and WIRTH 2014, MOLNÁR and JUHÁSZ 2016, SCHMIDT 2016, SCHMIDT et al 2016, FEKETE et al 2018, WIRTH 2018.…”