Hydnellum mirabile

Hydnellum mirabile is an inedible species of tooth fungus in the family Bankeraceae. It is found in Europe and North America, where it grows in old-growth, coniferous forests on base-rich or chalky soils. It forms mycorrhiza with Norway Spruce and occasionally Scots Pine.

Caps are brownish to dark brown with yellow edges, and have a hairy surface. They are funnel-shaped.The stipe measures 10-50 x 10-25mm and is dark brown and hairy at the base. On the cap underside (the hymenium) hang brownish spines with paler tips. The spores are roughly spherical with tubercles on the surface, and measure 5–7 by 4.5–6 μm. It has a weakly astringent taste. The spore print in buff brown.

It is estimated that there are less than 5000 mature individuals of this species in Europe, due to the impacts of forestry on old-growth forests. Particularly in its central European localities, Hydnellum mirabile is threatened by air pollution, particularly nitrogen deposition. Finland and Norway consider Hydnellum mirabile as vulnerable, France and Sweden consider it endangered, and the Czech Republic consider it as regionally extinct.