About garlic mustard
Garlic mustard (Alliaria petiolata) is a biennial invasive plant that prefers shady forests and floodplains.
Round to kidney-shaped leaves in rosettes the first year. Following spring, forms erect 1- to 4-ft. shoots with more triangular leaves, and begins flowering and dies by summer. Terminal spikes of white, 4-petaled flowers.
Mustard-like seeds in long, slender, upright capsules.