Genus species: Hydnellum caeruleum
Common name: Blue tooth
Common name: Blue tooth
Genus species: Morchella esculenta
Common name: Common morel
Common name: Common morel
Genus species: Imleria badia
Common name: Bay bolete
Common name: Bay bolete
Genus species: Tricholoma matsutake
Common name: Pine mushroom
Common name: Pine mushroom
Genus species: Tuber gibbosum
Common name: Oregon white truffle
Common name: Oregon white truffle
Genus species: Lactarius deliciosus
Common name: Saffron milk cap
Common name: Saffron milk cap
Genus species: Boletus edulis
Common name: Porcini
Common name: Porcini
Genus species: Suillus grevillei
Common name: Greville's bolete
Common name: Greville's bolete
Genus species: Amanita caesarea
Common name: Caesar's mushroom
Common name: Caesar's mushroom
Genus species: Hebeloma crustuliniforme
Common name: Poison pie
Common name: Poison pie
Genus species: Amanita pantherina
Common name: Panther cap
Common name: Panther cap
Genus species: Cantharellus cibarius
Common name: Chanterelle
Common name: Chanterelle
Genus species: Amanita muscaria
Common name: Fly agaric
Common name: Fly agaric
A large number of fungi infect the roots of plants by forming an association with plants called mycorrhiza (plural mycorrhizas or mycorrhizae). This association differs markedly from ordinary root infection, which is responsible for root rot diseases. Mycorrhiza is a non-disease-producing association in which the fungus invades the root to absorb nutrients. Mycorrhizal fungi establish a mild form of parasitism that is mutualistic, meaning both the plant and the fungus benefit from the association.
Reference: britannica.com