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The pileus is the technical name for the cap, or cap-like part, of a basidiocarp or ascocarp (fungal fruiting body) that supports a spore-bearing surface, the hymenium.〔Moore-Landecker, E: "Fundamentals of the Fungi", page 560. Prentice Hall, 1972.〕 The hymenium (hymenophore) may consist of lamellae, tubes, or teeth, on the underside of the pileus. A pileus is characteristic of agarics, boletes, some polypores, tooth fungi, and some ascomycetes. ==Classification== Pilei can be formed in various shapes, and the shapes can change over the course of the developmental cycle of a fungus. The most familiar pileus shape is hemispherical or ''convex.'' Convex pilei often continue to expand as they mature until they become flat. Many well-known species have a convex pileus, including the button mushroom, various ''Amanita'' species and boletes. Some, such as the parasol mushroom, have distinct bosses or umbos and are described as ''umbonate''. An umbo is a knobby protrusion at the center of the cap. Some fungi, such as chanterelles have a funnel- or trumpet-shaped appearance. In these cases the pileus is termed ''infundibuliform''. Image:Campanulate cap icon.svg|Campanulate (bell-shaped) Image:Conical cap icon.svg|Conical Image:Convex cap icon.svg|Convex Image:Depressed cap icon.svg|Depressed Image:Flat cap icon.svg|Flat Image:Infundibuliform cap icon.svg|Infundibuliform Image:Offset cap icon.png|Offset Image:Ovate cap icon.svg|Ovate Image:Umbillicate cap icon.svg|Umbilicate Image:Umbonate cap icon.svg|Umbonate 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pileus (mycology)」の詳細全文を読む スポンサード リンク
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