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Laricifomes officinalis (Vill.) Kotl. & Pouzar (syn. Fomitopsis officinalis) forms large, hoof- to beehive-shaped perennial conks, up to a meter long, on old larch and other conifers. Its soft, chalky, intensely bitter white flesh was among the most valued medicines of the ancient Greek and Roman world and of Pacific Northwest Indigenous peoples. It is rare and declining with old-growth forests and is listed as Endangered by the IUCN.
Europe, North Africa, Asia and western North America; rare and declining.
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