Reynoutria × bohemica is considered an invasive species in Europe and potentially invasive species in Ukraine. It is a hybrid that is morphologically similar to R. japonica. For a long time and sometimes now R. × bohemica has been misidentified as R. japonica. The data on its history of spontaneous distribution in Europe, main diagnostic morphological characters of leaf (shape, size and leaf abaxial surface pubescence), ecological and coenotic characteristics are summarized. The map of distribution of R. bohemica in Ukraine is prepared on the base of data of field trips and herbaria collections (KW, LWKS, CHER, KHER). The taxon is known in Ukraine since 2002. At present it is found in several localities from western (Transcarpathia, Chernivtsi and Lviv regions) and central (Zhytomyr, Kyiv and Poltava regions) parts of country.

Keywords: Reynoutria × bohemica, potentially invasive species, distribution, ecology, Ukraine

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