Alternatively known as Laughing Jim, Giant Flamecap, Spectacular Rustgill and Prächtiger Flämmling, all of which are acceptable names for adventurers in a Fritz Leiber novel, singly or together.
A yellow cortina covers the gills of the immature fruitbodies, breaking and shriveling to leave fragments around the rim of the cap and around the stipe." I think they're just making that up. "Fragments of cortina around the Stipe" sounds suspiciously like a re-make of that Sledgehammer video.
This time of year they sprout in impressive clumps from tree stumps or logs, or in this case from a piece of log that must have been ploughed just under the soil during the last round of landscaping.