There are 22 species of fungi called disco, according to the British Mycological Society’s list of English Names for Fungi 2016, and they have some delightful names, mostly referring to what they grow on, I think: Larch, Conifer, Larch canker, Rush, Heath sedge, Mast, Juniper, Fir and, my personal favourite, Hairy Nuts Disco!
So far I’ve only found two. My excuse is that they’re tiny, only a few millimetres across, so they’re difficult to spot, and many are quite rare. This first one is probably Lemon Disco (Bisporella citrina), and is actually one of the more common discos. It’s a wood-rotter that can be found growing – often in the thousands – on decaying deciduous trees, particularly oak.
This second fungus may be Snowy disco (Lachnum virgineum) – like so many fungi, it requires microscopic examination for a definite ID, and I haven’t reached that level in my mycological evolution … yet! Snowy disco also grows on dead and decaying wood, and is said to be frequent, though I’ve only found it once in 18 months of foraying.