Milk-white Toothed Polypore Irpex lacteus

Milk-white toothed polypore, Irpex lacteus, is a widespread wood decay fungus found across temperate forests worldwide. This distinctive bracket fungus forms thin, resupinate to effused fruiting bodies that spread across fallen branches, logs, and decaying hardwood. Its surface begins smooth and creamy white, but soon develops irregular, tooth-like spines or ridges that release spores, giving it a unique appearance compared to typical pore-bearing polypores.

Irpex lacteus is a white rot fungus, breaking down both cellulose and lignin, and plays an important ecological role in nutrient cycling. It is not edible due to its tough, thin texture, but it has been studied for its strong ligninolytic enzymes, which show promise in bioremediation and industrial applications. Its aggressive colonization ability also makes it a useful teaching and research organism in mycology labs.

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