Kingdom: Fungi
Phylum: Basidiomycota
Subphylum: Agaricomycotina
Class: Agaricomycetes
Order: Polyporales
Family: Meripilaceae
Genus: Grifola
Species: Unknown
Synonyms:  Polyporus, Polypilus, Cladodendron, Cautinia.

This species of Grifola grows on old wood and is found in Nothofagus (beech) forests. Some of the caps in the photos were >80mm wide.

Photographed at Mavora Lakes, Otago.
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Thanks to Wikipedia for text and information: https://creativecommons.org/licenses/by-sa/3.0/