Garlic Mustard
Alliaria petiolata

Adult
garlic mustard
Native to Europe, this plant is a biennial that may grow to 4' tall. Plants have a garlic-like odor. It is toxic to some native butterfies.
Rosette
garlic mustard
Rosette leaves are kidney shaped, while mature leaves are shaped like an arrowhead and are finely toothed.
Infestation
garlic mustard
Galric mustard prefers shady sites under forest canopies, in wetlands, roadsides and in disturbed sites
Seed
garlic mustard
4-petaled white flowers produce seed in narrow seedpods. Seed remain viable for at least 5 years in the soil.