Annulus (mycology)

from Wikipedia, the free encyclopedia

An annulus , sometimes called a cuff (hanging down), ring or ring zone (with veils ), is in mycology a ring-shaped structure on the stems of the fruiting bodies of many hat mushroom species . It arises (sometimes next to rags on the edge of the hat) from remnants of the velum left on the handle from the young stage. The velum is attached to the edge of the hat and the handle and thus initially covers the spore-bearing structures ( e.g. the lamellae). Later it tears open when it is displayed and reveals the spore-bearing structures on the underside of the hat - and leaves the ring and possibly shreds on the edge of the hat.

  • Hair veil-shaped

  • Hanging (cuff)

  • Ascending

  • Movable

  • Double ring

  • Stalk booted

A ring is used in its expression of a variety of possible forms for the fungus to specifications often an important determining feature. Weather conditions and careless harvesting can cause it to be lost, which can make identification errors easier. It can be either hanging, ascending (funnel-shaped), protruding or grooved (due to the imprint of the lamellae ), sometimes also double (in the case of giant parasols ), of a hairy or thread-like texture ( cortina ) or consist of only remnants of veil and dissolves some species also slightly up or down (ephemeral ring). In some species there is also a slimy ring that dries up quickly.

swell

  • Markus Flück: Which mushroom is that? 3. Edition. Franckh-Kosmos Verlags-GmbH & Co. KG, Stuttgart 2009, ISBN 978-3-440-11561-9 , pp. 19-20.