Self-heal

This little purple flower, Selfheal,  can grow up to 20cm high.
 

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But usually, when I see it in my lawn it is no more than a couple of centimetres and spreads like fury. 

 

It has been used as a healing herb for centuries, for wounds, minor injuries, sores, burns, bruises, sore throats, liver complaints, inflammations and allergies. 

John Gerard in the 16th century said "there is no better herb" and Nicholas Culpepper in the 17th century said it was called selfheal "because when you are hurt, you may heal yourself."