Answer:
invasive plant
Step-by-step explanation:
The purple loosestrife is an example invasive plant species.
Invasive plants are species of plants that are capable of causing a shift in species equilibrium in an ecosystem by spreading rapidly within a short period.
Invasive species are mostly non-native (exotic) and they are capable of out-competing and displacing native species, leading to a reduction in biological diversity, species extinction, altered habitats and economic loss.
The loosestrife ticked all the right boxes for an invasive species.