Ground-ivy is a sprawling or erect perennial of woodlands and shady banks. It flowers in early spring, and is thus a valuable source of nectar for early butterflies such as the brimstone. The pale violet flowers have an erect upper lip, and a 3-lobed lower lip with purple spots. The top leaves are tinged purple, and are covered with soft downy hairs. The main heart-shaped leaves have a bitter taste, and were once used for flavouring beer.

Side-on view showing hairy calyx		Leaves (opposite, heart-shaped)