Ajuga reptans, commonly known as bugle, blue bugle, bugleherb, bugleweed, carpetweed, carpet bugleweed, common bugle, is an herbaceous flowering plant native to Europe. It is invasive in parts of North America. Grown as a garden plant it provides useful groundcover. Numerous cultivars have been selected, of which "Caitlin's Giant" has gained the Royal Horticultural Society's Award of Garden Merit. Ajuga reptans is also a component of purple moor grass and rush pastures, a Biodiversity Action Plan habitat in the United Kingdom.