Jiří Hadinec, František Krahulec, Ladislava Paštová, Jan Doležal, Václav Buriánek, Rudolf Hlaváček, Jiří Rybenský
Lycopsis orientalis has been known from the Czech Republic as individual plants found three times. We report here on its occurrence in five new localities, from the north-western, central and eastern part of the country. This fact suggests that it is locally fully naturalised and its further spread is highly probable. We found chromosome numbers 2n = 16 for L. orientalis, and 2n = 48 for L. arvensis. Characters distinguishing the two species are given.