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Alliaria petiolata

Biological Category 
Plants
Species Type 
Other Herbaceous
LHPrism Status 
Tier 4 - Widespread

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Impacts of this species 

Garlic mustard is an invader of forest understories. This nonnative herb can form dense stands that have the potential to control light, water, and nutrient resources, and thus outcompete native herbs that occupy a similar niche. Laboratory studies suggest that the nonnative herb is allelopathic, releasing chemicals that prevent the growth of competing grasses and herbs. Field studies show that removal of garlic mustard leads to increased diversity of other species.