Garlic mustard was introduced from Europe. In this country, it is a terrible weed -- it grows in thick clumps that crowd out native plants. More on the garlic mustard threat from the Plant Conservation Alliance and from Invasive Plant Atlas of New England.
- Family: mustard (Brassicaceae)
- Habitat: moist woods, waste places, gardens
- Height: 2-3 feet
- Flower size: 3/8 inch across
- Flower color: white
- Flowering time: April to June
- Origin: Europe