However, several genera are also introduced noxious weeds in some parts of the world, costing money to be controlled. These invasive plants can have negative impacts on the diversity of local ecosystems once established. Such naturalised pests include Acaena, Cotoneaster, Crataegus, and Pyracantha.
however several genera are also introduced noxious weeds in some parts of the world costing money to be controlled these invasive plants can have negative impacts on the diversity of local ecosystems once established such naturalised pests include acaena cotoneaster crataegus and pyracantha