Crest Coral (Clavulina coralloides) fungus. Mycokey AI points to this species and it fits the book descriptions.

---

Size: 6000px × 4005px
Location: Box Hill, Surrey
Photo credit: © Nigel Sawyer / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: autumn, autumnal, box, britain, center, centre, clavaire, clavulina, close, close-, clump, cluster, copy, copyspace, coral, coralloides, crested, crêé, differential, dull, england, focus, fungi, fungus, green, hill, hills, history, kammkoralle, macro, moss, mosses, mossy, natural, nature, overcast, piece, selective, shade, shadow, side, sideview, space, surrey, uk, vegetation, view, woodland, woods, ziegenbart