Reynoutria × bohemica (Polygonaceae) – a new taxon to the Polish flora. Fragmenta Floristica et Geobotanica Polonica 7: 63–71. Kraków. PL ISSN 1640–629X. ABSTRACT: This paper presents new localities for the hybrid Reynoutria × bohemica Chrtek & Chrtková, which so far has not been reported from Poland. The distribution of all Reynoutria Houtt. taxa in Katowice town is also given (R. japonica, R. sachalinensis and R. × bohemica).