Definition: Urgineoideae is a family of fungi that includes several genera, such as the "Sclerotia" and the "Ungerei" families. These fungi are known for their ability to produce an enzyme called "sclerotinia," which causes the growth of fungal spores in the soil. The term "urgineoideae" refers to these fungal species, which are often associated with the development of fungal diseases and the colonization of soil by fungi.