little gem

Tidying up the garden I ferreted out some old flowerpots hiding under long grass. I was getting really fed up being stung by nettles or slobbered on by giant slugs when I saw this. About 1" round it glowed a fresh vibrant green.
Referring to reference books I thought it might be a moss but realised it was a liverwort. These simple plants, thought to be the first to move from sea to land some 400+ million years ago, were highly prized in the 1600's.

Nicholas Culpeper, writing in September 1653 from ' his house in Spitalfields next door to The Red Lion' , called it a 'singularly good herb for all diseases of the liver ... helps the running of the reins in men, and the whites in women; ..... a singular remedy to stay the spreading of tetters, ringworms, and other fretting and running sores and scabs ..... an ezcellent remedy for such whose livers are corrupted by surfeits ....'

What a magnificent CV for such a little fellow.