Fungi

Fungi are not plants, as was thought to be so in the past, but in a separate Kingdom of their own.  In most cases, the main body of the fungus is hidden from view.  It is a network of threads (hyphae) collectively called a 'mycelium', which permeate the substrate on which the fungus grows.  The hyphae absorb nutrients and water from the substrate.  The reproductive spore-producing structures, such as the familiar mushroom or bracket, are the visible parts of the fungus. 

The Fungus Kingdom is extremely diverse, and includes many microfungi that are rarely recorded.  Most of the larger species are in one of two major divisions or Phylum, based on the way the fungus reproduces.  Basidiomycota (sometimes called 'spore-droppers') include mushrooms and toadstools, brackets, corals, puffballs, jellies, rusts and smuts. The Ascomycota or 'spore-shooters' includes cups, morels, yeasts and many other smaller fungi.  

Taxonomy is very complicated and is liable to change as the true relationships between species are worked out.  In the sections below, we have grouped fungi into categories based on their structure and appearance rather than their place in the scientific taxonomic hierarchy.  There is more information under each section.

Recording fungi

Always note the substrate or host-plant on which the fungus is growing, and the habitat.  To identify many large species, it is helpful to get a good photograph of the cap (from the top), the gills or spore-producing structures (from underneath) and the stipe or stem (from the side) - three images from three angles, rather than images from much the same angle. 

Always note the texture of cap and stipe; the smell; and the presence of any staining or 'milk' produced when the cap, gills, stipe or body of the fungus is bruised. 

The colour of the spores can be very helpful.  It is best seen by taking a spore-print from a collected specimen - advice on doing this is in many of the resources below.  For some fungi, microscopic examination of the spores may be needed for identification.

Resources

The Leicestershire Fungi Study Group is a great place to start if you want to learn about fungi. They welcome new members. Their annual programme of study forays is led by enthusiastic and knowledgeable leaders. There are also indoor microscopy sessions held in Leicester. This is a really excellent way to broaden your knowledge, and make friends who share your interest in fungi.

There are many field guides, but none of them contain all the fungi you will find, or have all the photos or information you need, so it is a good idea to check several different books and websites. 

• Kibby, G. 2020-2022. Mushrooms and Toadstools of Britain & Europe, Volumes 1 - 4. (privately published)
• Laessoe,T. & Petersen,J. (2019)  Fungi of Temperate Europe. Princeton University Press, Volumes 1 and 2
• O'Reilly, P. (2016). Fascinated by Fungi. First Nature
• Sterry, P. & Hughes, B.  (2009). Complete guide to British Mushrooms and Toadstools.  Collins
• Wood, E & Dunkelman, J.  (2017).  Grassland Fungi: a Field Guide.  Monmouthshire Meadows Group

Useful websites include Pat O'Reilly's First Nature website,  the Buckinghamshire Fungus Group, the Hampshire Fungus Recording Group and Fungi Outer Hebrides. 

The British Mycological Society website is a good source of information, mostly aimed at the expert. 

If you know of other websites or books that you would recommend, do let us know: info@naturespot.org

Agarics and other fungi with caps and gills

In this section are most of the commonly recorded 'mushrooms and toadstools' with spore bearing gills underneath the cap.  Most of these are Agarics and related species, but we have included some families that have caps and gills but are unrelated - e.g. the Russulaceae. 

For most species, the spores fall from the gills and are dispersed by the wind.  Spore colour is an important way of identifying species and it may be necessary to take a spore print from a collected specimen.  As well as noting the colour, smell, texture, milk/staining, habitat and substrate, also note:

• the way the gills are attached to the stem or stipe; cutting vertically through the cap and stipe will help to see this (some examples are here: decurrent; adnate; adnexed/free)
• the colour of the gill edges (example: velvet shield)
• whether there is a ring around the stipe (some examples: wood mushroom;  porcelain fungus)
• whether there is a volva or sac at the base of the stipe (example: false death-cap)
• whether there is a veil or the remains of one under the cap. (example: birch web-cap

Inocybaceae - Fibrecaps

The species within this family are some of the most difficult to identify,usually requiring microscopic examination and sometimes DNA sequencing to identify; there are now dozens of named British species.  Spores are brown, and the size and shape varies between species from smooth to warty or nodulose.  Many species have a smell - one commonly encountered smell is described as 'spermatic' or like semen.  The genus Inocybe has recently been split into several genera; we recommend that you refer to Kibby V4 (2023) for details of genera and species.   

In the gallery below, an exclamation mark after the Red camera icon indicates that microscopic examination is needed.