Based on Darvin’s comment and my trust in his mycological knowledge, I updated this to S. squamosus. I then asked him for more reference data and he sent the following:
Johannesson, Hanna, Svengunnar Ryman, Hjordis Lundmark and Eric Danell. 1999. Sarcodon imbricatus and S. squamosus – two confused species. Mycol. Res. 103 (11): 1447-1452.
It turns out they were named in 1753 & 1774. About 50 years ago they were lumped together and forgotten. Older books list both, like McIlvaine: One thousand American fungi.
Phillips, 1981: Mush of Great Britain page 242 is Sarcodon squamosus, not S. imbricatum. Pelger, Roberts and Spooner, 1997 also have a good photo of it in their monograph: British Chanterelles and Tooth Fungi.
