I discovered my first Slime Mould in October 2019. Neither fungi nor plant, they are Myxomycetes. These organisms go through different stages. At one stage in their life cycle they are single cell amoebae. Most of my images show them as fruiting bodies which is the spore bearing stage. They are extremely small, averaging 1-4mm. This is probably the reason I had never noticed them before, during many years of photographing fungi.