DSC_0009

DSC_0009

Observation - DSC_0009 - UK and Ireland. Description: flat green fleshy pad found under a plant on a flowerpot about 1cm diameter. Is it a fern prothallus or a liver wort?

flat green fleshy pad found under a plant on a flowerpot about 1cm diameter. Is it a fern prothallus or a liver wort?