''Didymium difforme'' is a species of
slime mold
Slime mold or slime mould is an informal name given to several kinds of unrelated eukaryotic organisms with a life cycle that includes a free-living single-celled stage and the formation of spores. Spores are often produced in macroscopic mu ...
belonging to the family
Didymiidae.
References
Myxogastria
{{amoebozoa-stub