Some other polypores are roughly similar in appearance to H. nidulans and might be confused with it.
Phellinus gilvus has a yellowish to rusty-yellow fibrous cap, yellowish-brown flesh that stains black in KOH, and a grayish-brown to dark brown pore surface.
Hapalopilus croceus produces large fruit bodies with caps up to 20.5 cm (8.1 in) in diameter.
Its pore surface is bright reddish orange when fresh, and its flesh stains red with KOH.
Pycnoporus cinnabarinus has a tougher fruit body and is a brighter red color.
The edible "beefsteak fungus" Fistulina hepatica may readily be confused with H. nidulans.
It has soft, blood-red fruit bodies that ooze red juice.
Also edible, the "chicken of the woods", Laetiporus sulphureus, has bright yellow fruit bodies whose color fades in age.
Some other polypores are roughly similar in appearance to H. nidulans and might be confused with it. Phellinus gilvus has a yellowish to rusty-yellow fibrous cap, yellowish-brown flesh that stains black in KOH, and a grayish-brown to dark brown pore surface. Hapalopilus croceus produces large fruit bodies with caps up to 20.5 cm (8.1 in) in diameter. Its pore surface is bright reddish orange when fresh, and its flesh stains red with KOH. Pycnoporus cinnabarinus has a tougher fruit body and is a brighter red color. The edible "beefsteak fungus" Fistulina hepatica may readily be confused with H. nidulans. It has soft, blood-red fruit bodies that ooze red juice. Also edible, the "chicken of the woods", Laetiporus sulphureus, has bright yellow fruit bodies whose color fades in age.
Hapalopilus nidulans