Self heal, Prunella vulgaris, very pretty.

yes I agree. pretty and the bees love it but in the lawn it is a weed.

We have it everywhere, in the lawn it is flat and defies the lawn mower, same in the gravel path, but let it have more room and better soil and it will put up flower spikes that are good enough for cut flowers! I love it and can't bear to pull it all out - which is why I get so much seeded everywhere! Cause and effect. I have also bought the pink version of this.