The world’s largest mushroom is a fungus called Armillaria Ostoyae , or the Honey Mushroom that has sprawled out to cover a massive area. It grows in the Malheur National Forest which is located in the Blue Mountains, Oregon. It presently covers around 1,220 acres.
The world’s largest mushroom sculpture is located in Alberta, Canada. It is a large scale model of the Mushroom of the genus tricholoma uspale that grows naturally in the area. It is twenty feet high and has a 15 foot diameter. It weighs over 18,000 lbs.
The world’s largest mushroom producing country is The People’s Republic of China.
The world’s largest mushroom producing facility is Creekside Mushrooms LTD. They are the only underground mushroom producing facility in the USA and employs over 500 local people to help it produce a huge variety of products.
The world’s largest mushroom spore and live culture collection is held by the Florida Mycology Research Center (FMRC).
The world’s largest mushroom gun was built by the ex-dictator of Iraq; Saddam Hussein. (At least according to Larry’s Look at Life. (http://zhet.blogspot.com/)