|Bisporella citrina, Lemon Disco. High Elms Country Park, 2 January 2017.|
|Log with two fungus species. High Elms Country Park, 2 January 2017.|
|Chlorociboria species, Green Elfcup. High Elms Country Park, 2 January 2017.|
That's a great display for a mycologist, though in my opinion, rather an ugly colour ... the wood turns out quite nicely, though. At one time, it was dried and used to create Tunbridge ware, a form of decorative inlaid woodwork.
(The title of this post, "Green and Yellow" was the title of a folk song I knew as a teenager, a version of the song more commonly known as "Lord Randal." It did not refer to these fungi, though it could easily have done.)