Scientific name: Bondarzewia berkeleyi (Fr.)
Bondartsev & Singer
Derivation of name: Bondarzewia is named for A.S.
Bondarzew; berkeleyi is named for British mycologist
M. J. Berkeley (1803-1889).
Synonymy: Polyporus berkeleyi Fr.
Common names: Berkeley's polypore.
Occurrence on wood substrate: Parasitic and saprophytic;
at the base of oaks and other living deciduous trees, around
decaying stumps or from buried roots; July through October.
Dimensions: The entire rosette of overlapping caps may be
a meter or more across.
Upper surface: Creamy white to yellowish to tan,
somewhat zonate; dry; hairy or not.
Pore surface: Whitish, becoming dingy; pores large (0.5-2
mm), portions of the pore surface may appear maze-like.
Edibility: Edible when young, bitter with age.
Comments: Berkeley's polypore causes a butt rot of living
trees. When young, the flesh exudes a white latex. When it
first emerges from the ground it looks like a collection of
thick, irregular knobby fingers. The "fingers" expand into