The leaves are beautifully fresh and green and, in this example, patterned with purple black spots (hence the specific name maculatum, I suppose). These spots only occur on some of the plants and I have read that they are caused by a fungus Melanustilospora ari.
Since September 2003 the author has been making a minimum intervention study of a square metre of land and the immediate surrounding area in his garden in the East Sussex Weald at Sedlescombe near Hastings, UK. By April 2016 over 1000 species of plants and animals (none of which has been deliberately introduced) had been recorded and the area featured on many TV and radio shows including Spring Watch, and The One Show.