Lysimachia nummularia

Its common names include moneywort, creeping jenny, herb twopence and twopenny grass.

[2] It is a vigorous, prostrate, evergreen perennial growing to 5 cm (2 in) in height and spreading rapidly and indefinitely by stem-rooting.

It has rounded leaves arranged in opposite pairs, and cup-shaped yellow flowers 2 cm in diameter, in summer.

[2] It is native to Europe, but has been introduced to North America, where it is considered an invasive species in some areas.

The cultivar 'Aurea' (golden creeping Jenny) It is cultivated as an ornamental plant, for groundcover where the range of its growth can be limited.