Little green golf tees

I was thrilled to see some of these tiny, fascinating Lichen at Bowness Park yesterday. Though I had seen some a couple of times before, I don't usually see them. They remind me of little green golf tees. I did post a previous photo of the same species quite a while ago - not sure if I had the ID correct. Does anyone know if this is Cladonia Lichen? Also not sure if these come under a heading of "Fungi."