Slimy growth

Slimy growth

Observation - Slimy growth. Description: Several patches of this at the edges of an old concrete path. Patches vary in size from about 5cm to 15cm across. Have put in fungi and lichens group, but haven't got a clue really.

Several patches of this at the edges of an old concrete path. Patches vary in size from about 5cm to 15cm across.
Have put in fungi and lichens group, but haven't got a clue really.