I've been seeing this button-like fungus (clear to tan in color) growing on pine branches for a while now. Their bases come to tapered attachment points--similar to fungi within the Helotiales order (and some within the Dacrymycetales order). The color is more similar to something in the Auriculariales order, however. They didn't seem to change shape or grow beyond the stages photographed here in the span of the month I watched them. I've never seen them any other shape but this. The largest diameter fruiting body was slightly under 1cm.