Commonly known as Yellow Archangel, is a widespread wildflower in Europe, and has been introduced elsewhere as a garden plant. It displays the zygomorphic flower morphology, opposite leaves, and square stem typical of the mint family, Lamiaceae. The flowers are soft yellow and borne in axial clusters, with a prominent 'hood' (the dorsal lobe of the corolla) similar to that of Lamium. It works well as a ground cover because it spreads easily. Caution must be taken when planting due to its invasiveness.