Laricifomes officinalis
（重定向自Polyporus officinalis）
Laricifomes officinalis is a wood-decay fungus in the order Polyporales. It causes brown heart rot on conifers, and is found in Europe, Asia, and North America, as well as Morocco. It is commonly known as agarikon, as well as the quinine conk because of its extremely bitter taste. DNA analysis supports L. officinalis as distinct from the genus Fomitopsis.