That vivid yellow on a far stump is the sulphur-colored polyporus.
"Some Summer Days in Iowa" by Frederick John Lazell
Thome says that Boletus laricis and Polyporus fomentarius yield the "amadou" of commerce.
"Among the Mushrooms" by Ellen M. Dallas and Caroline A. Burgin
Bracket fruit form of Polyporus borealis growing from wound.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc." by George Francis Atkinson
It equals Polyporus polyporus.
"The Mushroom, Edible and Otherwise" by M. E. Hard
Growing on old wood, bark, Polyporus, etc.
"The Myxomycetes of the Miami Valley, Ohio" by A. P. Morgan
The edible Polyporeae are found in the genera Boletus, Strobilomyces, Gyrodon, Boletinus, Polyporus, and Fistulina.
"Student's Hand-book of Mushrooms of America, Edible and Poisonous" by Thomas Taylor
At these words Ladislaus Szekely changed colour as often as a genuine opal, or as a fractured polyporus fungus.
"The Slaves of the Padishah" by Mór Jókai