Pennywort Definition

Any of various plants with small round leaves growing in crevices of rocks and walls or in marshy places, as any of a genus (Hydrocotyle) of perennial plants of the umbel family and a small North American plant (Obolaria virginica) of the gentian family.

A Eurasian plant (Umbilicus rupestris) having fleshy peltate leaves and a tall stalk of yellowish-green flowers.

Any of various other plants having rounded leaves suggestive of pennies.