Hydnellum joeides (the epithet is sometimes spelled ionides or jonides)[3] is a species of tooth fungus in the family Bankeraceae.

[5] The fungus makes fruit bodies with flattened to concave caps measuring 2.5–10 cm (1.0–3.9 in) in diameter.

The crowded spines on the cap underside are up to 3 mm long, and are decurrent on the stipe.

[7] The fungus is found in western and central Europe, where it is an ectomycorrhizal symbiont of European beech (Fagus sylvatica), English oak (Quercus robur), and probably sessile oak (Quercus petraea).

Because of the continued decline in sightings in Europe, it has been proposed for inclusion on the IUCN Red List of Threatened Species.