Frog-bit (Hydrocharis) is a perennial plant that can be rooted or free-floating. Leaves are on stalks, simple and can vary in shape from round, to egg-shaped, to kidney, or heart-shaped, to 3 1/2 inches wide. Leaves often float on the water’s surface. Young floating leaves are often heart-shaped and have a spongy, purplish underside. Flowers are small, white (with 3 petals and 3 sepals) on a stalk about 1/3 the height of the leaves. Flowers can be above or below the waters surface.