Nummularia

Nummularia, usually referred to by its scientific name Lysimachia nummularia, known commonly as moneywort or creeping Jenny, is a perennial groundcover in the Primulaceae family. It forms creeping stems that root at the nodes and bears rounded, opposite leaves about 1 to 2 centimeters in diameter. In summer, it produces small yellow flowers with five petals that give the plant a bright display when conditions are favorable.

Native to Europe and western Asia, Lysimachia nummularia is widely cultivated as an ornamental plant in temperate regions. It prefers moist, well-drained soils and can tolerate full sun to partial shade. It often grows along ponds, damp borders, and shady wetlands. In suitable climates it can spread aggressively by runners, forming dense mats that suppress other vegetation.

Cultivation and care: It is propagated by stem cuttings or division; can be grown in containers or as a ground cover in boggy areas or near water features. It requires regular moisture; in drier conditions it may die back in drought. Some cultivars include variegated or golden-leaf forms, such as Lysimachia nummularia ‘Aurea’.

Pests and diseases: susceptible to fungal leaf spots in poorly drained soils; slug damage possible. In some regions, Nummularia can be considered invasive, so management may be required to prevent spread into natural habitats.