The stages of sexual reproduction in imperfect fungi are either unknown, understudied, or undiscovered. As a result, nothing is known about these fungal species' life cycles. We only have knowledge of the asexual stage of reproduction, which they refer to as the imperfect stage.
Here are some characteristics of fungi that are imperfect:
They exhibit a heterotrophic style of feeding.
They either live off of plants and animals as saprophytes or as parasites.
Haploid mycelium makes up their thalloid body.
The mycelium has several branches and is septate.
They procreate asexually by producing external spores.
When sexual phases in a species are discovered, they are moved to the taxonomic position of the group's Ascomycetes and Basidiomycetes.
Fungi with flaws include Alternaria, Microsporum, etc.