They're growing on dead wood. Unless you dig up the tree stump and its roots, they'll come back each autumn.

Take a hoe and scrape them off when they appear. I would leave them and let the fungus do its job of composting the dead wood into your soil. What you see are the "fruit" of the fungi.

If they were mushrooms I'd be delighted. Are they really ?

Hank, 'mushroom' and 'toadstool' mean the same thing, though there's a tendency to think that mushroom means edible and toadstool means inedible. If you call it a mushroom, that doesn't mean its edible - both are just the fruiting bodies of underground mycelium.

Ah, silly me - that shows exactly how much I know. ,

YOu're not alone, Hank, I used to think mushrooms were different from toadstools - I just hope these mushrooms in the pic aren't honey fungus - they're the right colour, the right time of year, but a closer examination is necessary to decide...

Honey fungus, believe it or not, is edible - but it kills healthy woody plants too...

The RHS site shows you how to peel the bark away from the trunk to see if this is honey fungus. Have you noticed any black lacy roots around that area because that is how honey fungus spreads. https://www.rhs.org.uk/advice/profile?pid=180

There's a Honey Mushroom in the Blue Mountains of Oregon that is 4 square miles in size and 2,500 years old. You cannot get rid of them. It creeps along underground and these caps are just the fruiting bodies. They will long outlive all of us.

They will not only outlive us Bath but when the time comes, live on us.

oh! too much info Loosestrife2 lol.