Penicillium notatum ... And it's made up of thousands of threadlike filaments called hyphae. It uses those filaments like roots: to feed. Hyphae extend into your stale bread or rotten tomato ...

When the spore germinates, it produces hyphae or branches ... Aspergillus fumigatus, and Penicillium chrysogenum. The most harmful fungus to health is Aspergillus (Aspergillus fumigatus).