Question

Hyphae that grow into a cottony mass

Answer 1

mycelium, it's the mass that gives it's characteristics.

Answer 2

Filaments of various length called hyphae , ( singular hyphae) some of which extend into the air while other penetrates the substrate on which they grow .The hyphae are arranged into a network called mycelium , it is the mass of the mycelium that gives fungal growth its characteristics “ Cottony “ or fuzzy