Fungi that are harvested wild and cultivated in numerous edible varieties.
Mushrooms grow all over the world.
There are at least 20 species of commercially cultivated mushrooms; the top five producers are China, the U.S., Poland, the Netherlands, and India.
There are many types of wild mushrooms that can be foraged, but amateurs should be careful—some are poisonous or only edible under certain conditions.
New Oxford Book of Food Plants by John Vaughan et al. (2009)
“What Is a Mushroom?” from the Government of British Columbia https://www.for.gov.bc.ca/hfp/publicaNons/00029/mushwhat.htm