Lysimachia nemorum, the yellow pimpernel, is a perennial flowering plant in the family Primulaceae. Description Lysimachia nemorum is an evergreen creeping perennial herbaceous plant growing up to about 40 cm. The bright green leaves are opposite, ovate, pointed and without teeth or hairs. The yellow flowers are about 8mm across, borne singly on long stalks in the axil of each leaf. They have five very narrow sepals, five pointed petals and five stamens. The ovary is superior, forming a capsule. Distribution Lysimachia nemorum is native to Great Britain and Ireland and the east of mainland Europe from the Pyrenees in the south to eastern Norway in the north. Its habitat is damp woodland. References nemorum Plants described in 1753 Taxa named by Carl Linnaeus