Stereum ostrea, also called
false turkey-tail and
golden curtain crust, is a basidiomycete fungus in the genus
Stereum. It is a plant pathogen and a wood decay fungus. The name
ostrea, from the word 'oyster', describes its shape. With concentric circles of many colors, it highly resembles
Trametes versicolor, turkey-tail, and is thus called the 'false turkey-tail'. The stemless fruiting body is shell-like and grows 1–7 cm (0.39–2.76 in) high. It is
(Wikipedia)