Annulus (mycology)

A ring can be seen on the stem of this Gymnopilus junonius mushroom.

An annulus is the ring-like or collar-like structure sometimes found on the stipe of some species of mushrooms. The annulus represents the remnants of the partial veil, after it has ruptured to expose the gills or other spore-producing surface. It can also be called a ring which is what the Latin word annulus directly translates as.[1] The modern usage of the Latin word originates from the early days of botany and mycology when species descriptions were only written in Latin. Outside of the formal setting of scientific publications which still have a Latin requirement,[2] it will often just be referred to as a ring or stem ring in field guides[3] and on identification websites.[4]

  1. ^ "annulus", Wiktionary, 2022-08-03, retrieved 2022-08-05
  2. ^ Figueiredo, Estrela; Moore, Gerry; Smith, Gideon F. (April 2010). "Latin diagnosis: Time to let go". Taxon. 59 (2): 617–620. doi:10.1002/tax.592027. hdl:2263/16700. ISSN 0040-0262.
  3. ^ Buczacki, Stefan (2012). Collins fungi guide. London: Collins. ISBN 978-0-00-724290-0. OCLC 793683235.
  4. ^ Kuo, Michael (2019). "Glossary (MushroomExpert.Com)". www.mushroomexpert.com. Retrieved 2022-08-05.