any fungus of the class Ascomycetes (or subdivision Ascomycota)
in which the spores are formed inside an ascus. A fungus whose
spores are borne in an ascus (a sack-like structure), e.g.
Penicillium, yeast. constitute the largest class of fungi
characterized by the production of sexual spores in structures
call asci. This includes plant pathogens, saprobes and
decomposers. With a few exceptions, most Ascomycetes do not grow
in buildings and are seldom agents of wood rot. Ascomycetes are
the perfect stages of molds like Aspergillus and Penicillium. At
high levels, Ascomycete spores may cause allergies. Since most
Ascomycetes are plant pathogens, ascospores are common during
the growing season of plants and are rare during winter, such as
those of the Ascomycetes genera: Daldinia, Hypoxylon,
Paraphaeospaeria, Phaeosphaeria and Leptosphaeria. a fungus that
forms its sexual spores inside a special cell called the ascus
ass-ko-mi-SEET Fungus that has saclike asci that house
ascospores. 478 A large group of fungi, w