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"Agaricus- A large and important genus of fungi, characterized by having a fleshy cap or pileus, and a number of radiating plates or gills on which are produced the naked spores."-Whitney, 1902

Common Mushroom

"Agaricus- A large and important genus of fungi, characterized by having a fleshy cap or pileus, and…

"The <em>Cydippe</em>, formerly called <em>Beroe Pileus</em>, is noe referred to this family, it has a globular body, with two long ciliated appendages." &mdash; Goodrich, 18591`

Cydippe

"The Cydippe, formerly called Beroe Pileus, is noe referred to this family, it has…

Pictured is marasmius oreades showing umbonate pileus.

Marasmius Oreades

Pictured is marasmius oreades showing umbonate pileus.

Pileus is the name given to the broad, expanded part in mushrooms. In the common mushroom it is frequently shaped like an inverted saucer.

Mushroom Showing Convex Pileus

Pileus is the name given to the broad, expanded part in mushrooms. In the common mushroom it is frequently…

"Common Mushroom (Agaricus campestris). A, annulus; C, cortina; H, hymenium; M, mycelium; P, pileus; S, stipe; V, volva." -Whitney, 1911

Meadow Mushroom

"Common Mushroom (Agaricus campestris). A, annulus; C, cortina; H, hymenium; M, mycelium; P, pileus;…

"Any piece of felt; more especially, a skull-cap of felt, a hat. These seems no reason to doubt that felting is a more ancient invention than weaving, not that both of these arts came into Europe from Asia. From the Greeks, who were acquainted with this article as early as the age of Homer, the use of felt passed together with its name to the Romans. Its principal use was to make coverings of the head for the male sex, and the most common one was a simple skull-cap." &mdash; Smith, 1873

Pileus

"Any piece of felt; more especially, a skull-cap of felt, a hat. These seems no reason to doubt that…

The Split Gill mushroom (Schizophyllum commune): "a, Schizophyllum alneum; b, gills, or lamellae, enlarged; c, cross-section of pileus showing split and revolute lamellae." -Whitney, 1911

Split Gill

The Split Gill mushroom (Schizophyllum commune): "a, Schizophyllum alneum; b, gills, or lamellae, enlarged;…