First off, let’s be clear. There is no such thing as “mushrooms and toadstools”. Really. They are all just different species of a particular group of fungi. The “mushrooms” you buy are developed from a species called Agaricus bisporus. There are lots of other “mushrooms” in the genus Agaricus, including the tasty Field Mushroom, Horse Mushroom and The Prince of the Woods. There’s at least one poisonous “mushroom” in the Agaricus group – the Yellow Staining Mushroom.
They could all just as easily have been labelled toadstools.
Resemblance, or relationship, to a nice safe shop mushroom is no guarantee of edibility. I’m going to call all of them mushrooms in this post. That doesn’t mean you should eat them if you find them. That’s the public health warning over.
Whichever species or type of fungus you have spotted and admired in woods and fields this autumn, you’ll have noticed that many of them appear to like being in a crowd. A nicely-rotting stump (that’s another fungus, by the way, assisting with the rotting process), may be festooned with troops of mushrooms, all of the same species. They can be mushroom-shaped:

Or completely bizarre:

But it is obvious they are “growing on” the stump.

Often a troop of mushrooms appears to be just coming from the soil, and you wonder, if that’s the case, why they have all congregated together in a wavy line, like an army on the march. If you were to dig them up (please don’t!), you’d probably find a buried root of a tree, living or dead. What appears to be lots of different mushrooms of the same type is actually all one organism. Inside the wood, fine, tangled threads called hyphae join to make the main “body” of the organism (the mycelium). And the mycelium naturally runs up or down the host – in many cases a root or buried stump, or dead branch. When the conditions are right for reproduction, the mycelium sends up the fruiting bodies (the mushrooms!), to form and shed spores. (Roots, flowers and seeds is the usual analogy).
Fungal mycelium can grow through all sorts of media, not just wood. Dead leaves and grasses, straw, manure of all kinds. Some are bizarre: ripening grain (Ergot of Rye), human skin (ringworm and athlete’s foot), bread (penicillin), caterpillars (long Latin name I’ve forgotten), potatoes (blight), other mushrooms (Boletus parasiticus, related to the gourmet delight Cep or Penny Bun). Toilet rolls and paperback books – oh you haven’t lived unless you’ve harvested your breakfast Oyster Mushrooms off a toilet roll! (unused, of course). In the course of its life, fungal mycelium also forms mutually beneficial associations with the roots of trees and other plants. Without fungi, it’s unlikely that our planet would support vegetation – and thus animal life – in the way that it does. You may have heard of these associations. They’re called Mycorrhizae (fungus-root), and gardeners can even buy them in bottles to get their favourite trees off to a good start.

The other thing the mycelium does, or appears to do, is grow in rings. All fungi grow like this, I think. Well, most of them anyway. Why do you think ringworm got its name? Think of the lovely (well, to a mycologist) concentric rings of Brown Rot on apples or plums. There’s huge variation in size and scale of course, but they all start as some kind of joined up patch, and grow outward, making a bigger and bigger circle. The fruiting bodies appear on the edges of the circle. With mushrooms, this gives you a “fairy ring”. Where the mycelium is decomposing on the inside part of the ring, nitrogen is given off. Nitrogen is really good for green plants; and if we’re talking a lawn, you’ll find that the grass just inside the ring of mushrooms will be lush and dark green. Once the organism has grown out the way, the centre dies off. (Sometimes the grass does, too, which is why fairy ring mushrooms are not viewed with approval by greenkeepers and the likes of folk who treasure lawns of even and controlled green-ness and height.)
Fairy rings will just keep on growing outwards, unless something happens to kill off the entire organism, and push up mushrooms on an annual basis. Each year, they’ll be further apart. Some can stretch across the landscape for miles (though it gets harder to track the ring of mushrooms) – but it is still all one organism.
Always look – or think – below the surface!
But was it really meant to look like this? Was dough meant to get all over the walls and floor? Why was I reduced to scraping and pouring the wet, sticky mess into bread tins? And when the book said “knead”, was it some kind of a joke, when “stir” or “whisk” might have been more appropriate verbs?





