Ajuga reptans, commonly known as bugle, blue bugle, bugleherb, bugleweed, carpetweed, carpet bungleweed, 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.
The bugle has dark green leaves with purple highlights. It is a spreading ground cover that grows in a dense mat. The leaves grow 5–8 cm (2–3 in) high but in the spring it sends up 10–15 cm (4–6 in) tall flower stalks with many purple flowers on them.
In folklore 
Bugle is also known as "carpenter's herb" due to its supposed ability to stem bleeding.
- Howard, Michael. Traditional Folk Remedies (Century, 1987), p108