Annulus (Mykologie)

An annulus, partly dependent on the expression as a cuff (hanging), ring or ring zone (in the case of veils), is in mycology an annular structure on the stems of the fruit bodies of many varieties of hat mushrooms. It originates (sometimes also beside scraps at the edge of the hat) from residues of an inner sheath (velum partial, partial sheath) from the young stadium. The inner sheath is attached to the edge of the hat and the stem and thus initially covers the sporadic structures (for example the slats). Later she tears open the screen and releases the sporontic structures on the underside of the hat - leaving behind the ring and possibly still scraps at the edge of the hat.

A ring is often used as an important determining factor in the development of various forms of fungi. It can be lost as a result of weather influences and careless harvesting, and can thus be used to assist in determining errors. It may be of a hairy or veiny nature (cortina), or may consist only of fog, and dissolves some species also slightly off or on (ephemeral ring). In some species there is also a mucous ring, which however quickly dries up. Edit sourcetext

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