Dollarweed, or pennywort, is an aquatic or water loving perennial that thrives in warm temperate regions. It is a member of the parsley family that was introduced to the Mid-Atlantic region from Asia.
It is a perennial weed that has bright green, rounded leaves with wavy margins. Small, white flowers bloom from July to August. The creeping stems root wherever their nodes touch the soil, increasing the number of plants. Dollarweed grows in moist shady lawns, gardens, and unplanted areas.