Brown Roll-rim

Just when I thought it was all over .... I came across this Brown roll-rim. The cap is a sort of dark ochre colour and very sticky. It has a quite deeply depressed centre - a bit like a funnel - and the characteristic in-rolled margin. Underneath it has these ochre coloured gills, slightly more yellowy than the cap. I think the gills are correctly described as being 'decurrent', that is they extend downwards onto the stem. I knew I should have come across this one because it is quite common among birch on acid heathland.

PS before anyone asks, you'd only ever eat one of these - it is deadly poisonous (an alternate name is Poison Pax) and infamously responsible for the death of German mycologist Julius Schäffer in 1944. There is no antidote.