Garlic Mustard, Alliaria officinalis
Brassicaceae or Mustard Family
 
Plant to several feet tall, often growing in crowded populations.  Flowers small, white, with 4 petals, in clusters at top of plant.  Leaves heart-shaped to triangular, with large teeth.  Leaves smell of garlic when bruised.  Fruit a long, dry, brown capsule, seen above right.

Garlic mustard is an invasive exotic, not native to this area.  It invades woodlands, displacing native plants, and is not a welcome resident of Wildwood.  It is nonetheless common, especially at the edges of the park and along trails and the bikeway.

Other members of this family with white, four-petaled flowers have leaves that do not resemble those of garlic mustard, so the plant is easily recognized.