what are masses of the filaments known as hyphae called
Mycelium as seen under a log. Mycelium is the vegetative part of a fungus, consisting of a mass of branching, thread-like hyphae. The mass of hyphae is sometimes called shiro, especially within the fairy ring fungi.ycelium, like fungus, can be considered a mass noun, a word that can be either singular or plural. The term mycelia, though, like fungi, is often used as the preferred plural form. Sclerotia are compact or hard masses of mycelium.