When it's a slime-mould! Slime-moulds had biologists fooled
for a while. Most often seen as yellow masses on moist rotting
wood in the shade, they have a lifestyle, habitat, and life
cycle just like the fungi, and they produce spores. But a closer
look reveals that slime-moulds do not consist of hyphae. Their
bodies are formed of amoeboid
cells and these assimilative bodies do not have cell walls.
The spores produced are encased in walls of cellulose; those
of fungi is of chitin or other polysaccharide.
We now know slime-moulds are not related to the fungithey
are placed in a protozoan division (phylum) known as the Myxostelidabut
because they are still included in many fungus field guides,
we have included them on this website.
Other fungi such as the Oomycota that includes Phytophthora,
are also not "true fungi".