Found solitary, in groups, or in rosettes on decaying wood (usually conifers).
Description
Fruiting body: Yellow-red to reddish-brown with white/light yellow margin; irregular, wavy; zoned; dorsal surface covered with short, stiff hairs giving a matted or felted feel; fan-shaped; flesh yellow to rusty brown. Pores: Golden to rusty-brown; gill-like to labyrinthine (often both), sometimes with elongated pores (J. Solem, pers. comm.). Flesh turns black with application of KOH (L. Biechele, pers. comm.).
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Gloeophyllum sepiarium, the rusty gilled polypore, is a wood decay fungus that causes a brown rot. Gloeophyllum sepiarium grows in thin, dark brown/green brackets on dead conifers. Often found on wood in lumberyards, the fruiting body grows for only one year, and produces spores in late summer and autumn. Its hymenial surface is distinctive from other polypores due to the presence of gills. Gloeophyllum sepiarium is inedible.[1]
The cap is 2–15cm wide, loosely fan-shaped, brown with a yellow-orange margin during growth, velvety then smooth, and leathery with a mild odor and taste.[2] The spores are white, cylindrical, and smooth.[2]