Skip to main content

Thin-maze Flat Polypore


Daedaleopsis confragosa. In Greek mythology, Daedalus was the father of Icarus and the architect of the labyrinth that imprisoned the Minotaur. Confragosa means rough and scaly. The pores are conspicuously labyrinthine and bruise light brownish red. The cap is a light color and becomes more concentrically zoned in age. One specimen was 7.5 cm wide; the other, fresher specimen was 10 cm. They can be up to 16 cm wide. In the third photo it looks like the mushroom has a stalk, but it's just resupinate there. Kuo says the mushroom turns dark gray to black in KOH. My reaction was dark brown. This mushroom causes a white rot, as you can see in the last photo. I'm not sure what kind of tree it was growing on. It might have been Sassafras, Sassafras albidum.

 Daedalea quercina is very similar, but it doesn't bruise, has thicker pore walls, causes a brown rot, and prefers oak. 

Arora says Daedaleopsis ambigua "is a similar southern species with a whiter cap." He describes D. confragosa as "reddish-brown to brown to grayish, sometimes blackish in old age" (p. 588). Polypores and Similar Fungi of Eastern and Central North America does not list D. ambigua but describes D. confragosa as "yellow-brown to reddish brown or grayish brown" (p. 111). So, I wonder. . .