Fomitopsis officinalis

Fomitopsis officinalis (synonym Laricifomes officinalis), known as agarikon, quinine conk, or white agaric, is a large perennial bracket fungus that grows on the trunks of conifers such as spruce, larch, and pine. Distinctive columnar or hoof-shaped conks are soft and yellow-white when young, becoming chalky white with age, and the flesh is intensely bitter. Once widespread across Europe, Asia, and North America, it is now rare and is considered effectively extinct across much of Eurasia, surviving mainly in the old-growth forests of the Pacific Northwest of North America.

History

Agarikon is one of the oldest documented medicinal mushrooms. The Greek physician Dioscorides described it around 65 AD as a treatment for consumption (tuberculosis), and Pliny the Elder recorded the Roman name agaricum. The common name agaric is traditionally said to derive from Agarus, a town of the Scythian Agari people. European and Central Asian herbalists used it for chronic coughs, asthma, bleeding, and infected wounds, while Indigenous peoples of the Pacific Northwest coast carved the large conks into shamanic spirit figures and grave guardians. The species epithet officinalis itself signals its long history as an apothecary medicine.

Overview

Ecologically, F. officinalis is a wood-decay fungus that causes a brown cubical rot in standing conifers and is restricted to old-growth habitat now in steep decline. Modern interest centers on its antimicrobial chemistry: research led by Paul Stamets, submitted to the U.S. Bioshield BioDefense program, found that cultured mycelial extracts showed strong antiviral activity against pox viruses and influenza, and the fungus contains agaric acid (agaricin) and lanostane triterpenoids with documented antibacterial and anticancer activity in vitro. Because the species is rare and endangered, harvesting wild conks is discouraged in favor of culturing.