The offspring laid on garlic mustard do not survive. However, their attacks were of little consequence to plant performance or reproduction of garlic mustard. In Europe, where garlic mustard is native, 76 things consume it. It may be that this butterfly is slowly adapting to garlic mustard. One species of weevil that targets garlic mustard, for instance, consumes the seeds. Up to 76 things feed on garlic mustard in its native environment. The main trees are oak and hornbeam, and ground flora include bluebell and garlic mustard. Sixty-nine insect herbivores and seven fungi are associated with garlic mustard in Europe. Garlic mustard can invade stable forests as well as disturbed sites. As an example, up to 76 things feed on garlic mustard in its native environment. Garlic mustard is an invasive plant species in North American temperate forests. Garlic mustard also competes with the plants for space and nutrients. Purple winter creeper (Euonymus fortunei) and garlic mustard (Alliaria petiolata) currently threaten the forest. Garlic mustard is toxic to several rarer North American "Pieris" species. Alliaria petiolata, or garlic mustard, is a biennial flowering plant in the mustard family (Brassicaceae).