| Summary: | Complex of 4 closely related Asteraceae species with different invasive status (native Bidens tripartita, casual aliens Cosmos bipinnatus, Coreopis tinctoria and invasive alien Bidens frondosa) was studied to clarify the invasive success of Bidens frondosa and to assess the invasive potential of both unsuccessful aliens. Among studied characteristics were included: reproductive traits (germination in different regimes, seed viability and seed production), growth characteristics (relative growth rate, biomass production and height of adult plants), tolerance to drought and competitive ability. The apllied part was focused on the impact of Bidens frondosa on species diversity of invaded communities.
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