Wolfiporia extensa

''Wolfiporia extensa''(''syn.'' ''Poria cocos'' F.A.Wolf), commonly known as hoelen, poria, tuckahoe, China root, fu ling (, pīnyīn: fúlíng), or matsuhodo, 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, known as Tuckahoe or fu-ling (), 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. Provided by Wikipedia