''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 Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single extant class, Pinopsida. All extan ...

. 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

polypore Polypores are a group of fungi that form large fruiting bodies with pores or tubes on the underside (see Delimitation for exceptions). They are a morphological group of basidiomycetes-like gilled mushrooms and hydnoid fungi, and not all polypor ...

s due to the presence of gills. ''Gloeophyllum sepiarium'' is inedible. The

cap A cap is a flat headgear, usually with a visor. Caps have crowns that fit very close to the head. They made their first appearance as early as 3200 BC. Caps typically have a visor, or no brim at all. They are popular in casual and informal se ...

is 2–15 wide, loosely fan-shaped, brown with a yellow-orange margin during growth, velvety then smooth, and leathery with a mild odor and taste. The spores are white, cylindrical, and smooth. Similar species include ''

Daedalea quercina ''Daedalea quercina'' is a species of mushroom in the order Polyporales, and the type species of the genus '' Daedalea''. Commonly known as the oak mazegill or maze-gill fungus, the specific epithet refers to the oak genus ''Quercus'', upon which ...

'', ''

Lenzites betulina ''Trametes betulina'' (formerly ''Lenzites betulina''), sometimes known by common names gilled polypore, birch mazegill or multicolor gill polypore, is a species of inedible fungus. Although it is a member of the Polyporales order, its fruitin ...

'', and ''

Trametes versicolor ''Trametes versicolor''also known as ''Coriolus versicolor'' and ''Polyporus versicolor''is a common polypore mushroom found throughout the world. Meaning 'of several colors', ''versicolor'' reliably describes this fungus that displays a variet ...

''.

References

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Wood-decay fungi Gloeophyllales Fungi of Europe Fungi of North America Fungi described in 1783 Inedible fungi Taxa named by Franz Xaver von Wulfen {{fungus-tree-disease-stub