|Wolfiporia extensa sclerotium|
Wolfiporia extensa (Peck) Ginns (formerly known as Poria cocos F.A. Wolf) is a fungus in the Polyporaceae family. It is a wood-decay fungus but has a terrestrial growth habit. It is notable in the development of a large, long-lasting underground sclerotium that resembles a small coconut. This sclerotium (called "Tuckahoe", or Indian bread) was used by Native Americans as a source of food in times of scarcity. It is also used as a medicinal mushroom in Chinese medicine.
- Esteban CI (2009). "Interés medicinal de Poria cocos (= Wolfiporia extensa)" [[Medicinal interest of Poria cocos (= Wolfiporia extensa)]] (PDF). Rev Iberoam Micol (in Spanish) 26 (2): 103–7. doi:10.1016/S1130-1406(09)70019-1. PMID 19631158.