Variability of the taxa of the BidensL. Genera and the problem of hybridization

The complex of microspecies of the Bidensgenus referred earlier to B. × garumnaeis characterized. Generation F1does not inherit the prostrate habit and entire leaves, which are specific to parental plants, but each sample is uniform and has its own set of morphological and biological characteristics. In the studied locality, only one B. radiata× B. frondosahybrid grows. No proof of the hybrid origin of other microspecies was found. It is proposed to perform the molecular genetic analysis of plant samples referred earlier to Bidens× garumnaeand to describe them in the future as independent microspecies or intraspecific taxa.