nature's wall art

 seen on a stone wall in town.

This plant is Maidenhair Spleenwort (Asplenium trichomanes), a small, evergreen fern often found growing in rock crevices or on old stone walls.It is characterized by its narrow, dark-green fronds with small, rounded leaflets arranged in pairs along a distinct blackish stem.The fern thrives in calcareous (lime-rich) habitats, specifically in cracks in rocks or cliff faces.It forms dense, rosette-like tufts that can reach up to 30 cm in length.  

Info found by using Google lens