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.svg|Offset Image:Ovate cap icon.svg|Ovate Image:Umbillicate cap icon.svg|Umbilicate Image:Umbonate cap icon.svg|Umbonate ==See also==