a) Gilled mushrooms The fruit body of the mushroom consists of a stipe that supports umbrella shaped cap called as pileus. There are gills or lamellae on the under side of pileus. In young stage, gills are enclosed by a membrane, which extends from pileus margin to stipe. This membrane is known as partial veil and usually tears around the margin of the pileus while expanding. In few mushrooms, it remains attached to the stipe where it forms a ring that is called as annulus. In some mushrooms, a membrane called universal veil or general veil covers the young buttons. When the cap expands, the veil in tern and the remnants at the base form volva and some of the fragments remain attached to the surface of pileus. It is not necessary that all gilled mushrooms should contain all these morphological features. Certain gilled mushrooms do not contain annulus, volva and others with them.
b) Other mushrooms Certain other mushrooms differ in morphology in comparision to the gilled mushrooms. Few of such mushrooms are listed below;
Cyphelloids mushrooms: These mushroom produces cup-shaped fruiting bodies
Gasteroids mushrooms: Fruit bodies of gasteroids are closed and bag-shaped. These are divided in to three kinds further as mentioned below; a. Earth star: At maturity, the exoperidium (outer layer) splits into four to five rays b. Puff balls: In this, matured fruit bodies looks like a ball c. bird's nest fungi : Fruit bodies resemble like a tiny egg-filled birds' nests.
Clavarioid mushrooms: It produces erect, simple or branched fruit bodies and are also called as club fungi and coral fungi.