These are the aethalia (spore-making structures) of a kind of Slime Mold, Lycogala epidendrum, found on a rotting fallen tree at Cedar Sink, Mammoth Cave National Park
Found on a log in our backyard
on unidentified log in open park land.
Lycogala epidendrum, commonly known as wolf's milk, groening's slime is a cosmopolitan species of plasmodial slime mould which is often mistaken for a fungus. The aethalia, or fruiting bodies, occur either scattered or in groups on damp rotten wood, especially on large logs, from June to November. These aethalia are small, pink to brown cushion-like globs. They may excrete a pink paste if the outer wall is broken before maturity. When mature, the colour tends to...