dog vomit slime mold
A couple of blobs of dog vomit slime mold turned up in the garden bed today. Thick and foamy, and a bit like scrambled eggs or expandable foam. Fuligo septica, probably.
"They are not associated with any plant disease. Rather, they are an important component of the soil ecosystem and indicate that there is a decent amount of moisture and organic matter in the soil." http://blogs.ifas.ufl.edu/pinellasco/2011/04/22/those-mysterious-molds-part-1-the-blob/