I noticed this patch of liverwort on the stone steps leading down into the left-hand side of the watermeadow.
What is a Liverwort? It is a spore-producing plant without the usual plant structures, but a collection of liver-shaped lobes. Most Liverworts can reproduce by growing gemmae, which are buds of tissue that are dispersed from the parent plant by rainfall and grow into new plants. The crescent-cup liverwort has crescent-shaped sconces which contain tiny green gemmae. You can see some in the top right of the top picture. Liverworts love damp and shady habitats. They grow on stones, boulders, banks, and soil.