A Striking Slime Mould.
Going out on a limb here by identifying this slime mould as Trichia decipiens. It seems there are two other possibilities; Hemitrichia calyculata and H. clavata. One reference mentioned that to differentiate at this stage a microscope is needed! Sorry, don’t have one available. The other said that one of them has a solid stalk. Hard for me to determine when the stalk is about 1mm long. I do have to say that they make interesting photographic subjects! These specimens were on the underside of a rotting alder tree.