European frog's-bit is a free-floating plant with clustered heart-shaped leaves. Resembling small water lilies, frog's bit has white flowers with three petals and yellow centers that bloom in the summer. European Frog's-bit is native to Europe but was introduced to North America in the 1930s as an ornamental pond plant. It is one of eleven invasive aquatic species identified in Maine law as illegal to import, sell, and transport. What is a way to prevent its spread in Maine lakes and ponds?​