(Lysimachia nummularia or L. nummelaria)
Creeping, low-growing perennial with round, opposite leaves and yellow flowers.
Other names for this plant include:
- Common names: Creeping Jenny, creeping Joan, running Jenny, wandering Jenny, wandering sailor
- Scientific names: None.
- Invades moist forests, woodland edges, floodplain forests, swamps, wet meadows, fens, stream borders, lawns, roadside ditches and grasslands.
- Moneywort has been known to choke small springs and seeps in rich woods due to its rapid spread and ability to form dense layers.
- This species is capable of rapid vegetative spread that can form dense, low-growing mats.
- This species forms a dense ground cover layer, thereby altering the plant community structure and reducing the population size of some native species in the herb layer.
- Noted as an invasive species throughout much of the United States.