Lysimachia nummularia (syn. Lysimachia zawadzkii Wiesner) is a species of flowering plant in the family Primulaceae. Its common names include moneywort, creeping jenny, herb twopence and twopenny grass.
It is native to Europe, but has been introduced to North America, where it is considered an invasive species in some areas. It aggressively spreads in favorable conditions, such as low wet ground or near ponds. It is moderately difficult to remove by hand pulling. Any tiny piece left behind will ...