This is not an ivy, as the name may suggest, but it belong to the same family as dead-nettles, Lamiaceae. It grows in a large ground-covering mat showing beautiful bluish mauve (they can sometimes be pink) blooms. The flowers are about 2cm long and are two-lipped with pink spots on the lower lip. The leaves are kidney-shaped to rounded, toothed and long-stalked. This is a perennial plant which can grow up to 25cm tall, and in the summer it spreads by sending out runners along the ground, similar to ivy.
It flowers March to September, and gives off a strong smell. It can be seen on bare ground, field and woodland margins, woodland clearing and hedgerows. It much prefers damp habitats. It is widespread and generally common.