Quotes: Fungus Humongous

"We have jungle mushrooms on my island too, but not this huge!"
Knuckles, Sonic Heroes

"Now THAT's a big mushroom!"
Wence, Magi-Nation

"It sounds like a... why, a huge, gargantuan, swollen, bloated mushroom!"
Griswold, Diablo

Despite their subterranean abodes, Nosferatu practice certain forms of horticulture. Over the centuries, the clan has bred and hybridized various sorts of fungus, splicing one with the other to produce species unknown to mortals. Some of these monster mushrooms tower as high as small trees... these gardens often become expansive jungles of weird, phospherescent beauty: slime moulds, enormous moths and the like ooze and whirr through the depths, just as birds and beasts traverse the terrestrial jungle.

A colony of honey fungus in upper Siberia is estimated to be more than 11,000 years old, spanning four hundred square kilometers. It's been worshipped as a god by local villagers, and on occasion has been known to perform great miracles.
The Dragon, after-mission report on "Clearing The Waters", The Secret World