|garlic mustard (Alliaria petiolata)||
garlic mustard (Alliaria petiolata; MUSTARD FAMILY [Brassicaceae]) Erect 12-48” biennial woodland herb often found growing in dense colonies. Evergreen basal rosette develops during first year, then 1 or 2 flowering stems in the second year. Numerous 4-parted ¼” white flowers in spring, followed by slender 1-2½” capsules. Stems and leaves with strong garlic odor when crushed. An invasive European native that poses a significant threat to Wisconsin’s woodland flora. 
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