The most common fungi belong to the class (club fungi), which Includes: Mushrooms, puffballs, shelf fungi, rusts and smuts. Members of this group produce spores on club shaped structures called .

The fruiting body of mushroom (its reproductive part) is the . The cap is supported by a tall stalk called a . It is anchored into the soil by .

Some mushrooms are edible, but others may be deadly poisonous, like , the "death angel". Other harmful fungi in this group may include , a fungus disease that alternates between wheat plants and the barberry bush, , which produces large deformed growths on ears of corn, and , a fungus that grows on rye and causes severe problems if eaten.

The Class or "sac fungi" produce spores in sack-like structures called an .
This group includes the common which produce energy by fermentation and
release carbon dioxide and alcohol as by-products. They are used in and brewing industries. Yeasts reproduce asexually by a simple type of division called . Some other yeasts, such as Candida, may be parasitic, causing yeast infections in the reproductive tract.

Other well-known members of this group includes the powdery mildews which cause diseases of , roses, and grapes, Dutch elm disease which kills elm trees, and Chestnut which is responsible for killing most of the chestnut trees in the U.S.

The class (imperfect fungi) is made up of a miscellaneous group of fungi in which reproduction has not been discovered.

Well-known types of this group include:
Athletes foot and which cause parasitic skin infections, which causes yeast infections, and Penicillium, which is used to make the called penicillin, and also flavors cheeses.

DIVISION - MYXOMYCOPHYTA ( molds)

The body of a slime mold resembles an , but its reproductive stage resembles fungi.
The body of a slime mold is called a .