Wolfiporia extensa
Wolfiporia extensa (Peck) Ginns ("syn." "Poria cocos" F.A.Wolf) is a fungus in the family Polyporaceae. It is a wood-decay fungus but has a subterranean growth habit. It is notable in the development of a large, long-lasting underground sclerotium that resembles a small coconut. This sclerotium called "(Chinese) Tuckahoe" or fu-ling(茯苓, pīnyīn: fúlíng), is not the same as the true tuckahoe used as Indian bread by Native Americans, which is the arrow arum, "Peltandra virginica", a flowering tuberous plant in the arum family. "W. extensa" is also used extensively as a medicinal mushroom in Chinese medicine . Indications for use in the traditional Chinese medicine include promoting urination, to invigorate the spleen function (i.e., digestive function), and to calm the mind. Names. Common names include hoelen, poria, tuckahoe, China root, fu ling (, pīnyīn: fúlíng), and matsuhodo. Botanical extract. "Wolfiporia extensa" is a source of a triterpenoid compound, pachymic acid, which has been the object of scientific study based upon the mushroom's role in traditional Chinese medicine. The species is often called "cocos" in this context.