Hyrocotyle umbellata, is an aquatic, or water-loving, perennial plant that thrives in sandy edges. Hydrocotyle americana, a species native to the USA, thrives in water in warm, temperate climates. Common names are dollarweed, marsh or water pennywort or navelwort although the latter names are also used for unrelated plants such as Umbilicus rupestris. In the USA, an introduced plant, Hydrocotyle sibthorpioides, is a common native weed of lawns that grows best in moist clay soils, but can also survive in loamy compacted soils.