Bracket fungus

Bracket fungus

Observation - Bracket fungus. Description: Saucer like brackets on decaying wood (possibly birch) Pale cream with darker browny rings and a slightly wavy edge. Between 3 and 6 inches at their widest point. Algae in centre of larger ones. ?Trametes sp Any advice on good field guides for fungi?

Saucer like brackets on decaying wood (possibly birch) Pale cream with darker browny rings and a slightly wavy edge. Between 3 and 6 inches at their widest point. Algae in centre of larger ones. ?Trametes sp
Any advice on good field guides for fungi?