Gomphidius glutinosus, commonly known as glutinous gomphidius, purple slime spike, slimy spike, slimy spike-cap, or hideous gomphidius, is a species of gilled mushroom. Although it has gills, it is a member of the order Boletales, along with the boletes. Initially, it is completely covered with a slimy veil, breaking through to reveal a greyish or brownish-capped mushroom with decurrent greyish gills which sometimes resembles a child's top.

The species is found in Europe and North America. It sprouts in pine, fir and spruce woodland in autumn. Opinions differ on the suitability of this mushroom for the table, with some holding it in high regard and others viewing it with caution.

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