The type of fungus in which sexual phase is not clearly found is known as fungi imperfecti.

i) In the life cycle of this type of fungus, sexual reproduction is fully absent, as a result their life cycle is incomplete in nature

a1ii) They are either saprophytic or parasitic in nature Parasitic fungus causes many diseases in animals and plants including humans,

Example- Helminthporium, Pycnidrum.