This is the only common mint species which grows in wet habitats in Norfolk. The flowers vary from mauve/purple to pink, blue or lilac, and develop in clusters at the end of the square shaped stems. Leaves are arranged in pairs along the sometimes sprawling stems and are ovate with shallow blunt teeth. The stems will root at the nodes and creep along. The distinctive and refreshing minty aroma (not peppermint) if the plant is crushed underfoot is often what first draws attention to this species. The aroma is strongest when the leaves are rubbed or crushed.