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Invasion by hybridization between native and non-native purple coneflowers (2013)

In western Minnesota prairie restorations have been planted near native prairie remnants. Two non-native Echinacea species (E. pallida and E. purpurea) have been planted in restorations. We want to know the extent to which the non-natives affect reproduction in the native species. Non-native pollen is hypothesized to interfere with pollination in the native and hybridization between the