Coltricia perennis, also known as Tiger's Eye, is an annual polypore that is very unusual in that it grows in the soil rather than on dead wood. It prefers humus-rich sandy soil on woodland edges and on acidic heathland.
upper surface zoned concentrically in shades of ochre, grey and rust with maroon tinge, disc-like, at first finely downy, becoming smooth with age; stem rusty-brown, downy, more or less central. Flesh brown, thin, corky, harder when dry.
Several tooth-fungi are similar above but have spiny undersides.
on the www.first-nature.com web site.