H. olivaceoalbus shows similarities between other closely related fungi of the genus Hygrophorus, some of which have only minor differences in physical features.

It is caused by two very closely related fungi, Tilletia tritici (syn.

The cause is a group of closely related fungi that are nearly ubiquitous, and since cure is impossible, prevention is essential.

Candida albicans and related yeast-like fungi are commonly found in the genital tract, particularly in women, and do not often produce infection or symptoms in the male.

Across most EcM host lineages, there appears to be low levels of specificity, as EcM plants tend to form symbioses with many distantly related fungi.

He showed that since closely related pathogenic fungi tend to prefer closely related host plants, fungi could serve as an aid to plant taxonomy and vice versa.

'This is a characteristic of the mushroom and related fungi, while others are parasitic.'

The most similar and also the most closely related fungus is Lactarius fennoscandicus, a boreal to subalpine species.

The ability to produce penicillin appears to have evolved over thousands of years, and is shared with several other related fungi.

Ergotamine is a secondary metabolite (natural product) and the principal alkaloid produced by the ergot fungus, Claviceps purpurea, and related fungi in the family Clavicipitaceae.