Genus
Hydnum (Hedgehog mushrooms)
Hydnum olympicum. Photo: (c) Christian Schwarz, some rights reserved (CC BY-NC)
Hydnum is a genus of fungi in the family Hydnaceae. They are notable for their unusual spore-bearing structures of teeth rather than gills. The best known are the edible species Hydnum repandum and H. rufescens. The word is derived from (h)udnon/ύδνον, an Ancient Greek word for truffle. The white or buff Hydnum repandum has a spore scatterer of still another shape. The smooth cap grows as wide as 8 inches across. The stem is off-center and is
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