girls carried ragged robin, naming each plant for a local boy. The flower that opened first would have the name of the boy the girl would marry. In another tradition men would carry ragged robin in their pockets, whether the plant thrived or not indicated success in love. It has no known herbal uses but can be associated with goblins and evil. I didn't see any goblins, I will look more carefully when we return next week!
In the language of flowers ragged robin represents ardour, and also is a symbol for wit.