Found, by chance, this surprising fact here :
What is the largest known single organism on Earth? A blue whale? A giant redwood? Actually the largest single organism known is a fungus (an individual of Armillaria ostoyae - one of the "honey mushrooms") growing in western Washington state. This organism consists mostly of underground mycelia and covers 2,200 acres. It is estimated to weigh perhaps 4,000 tons ( 8 million pounds) and is thought to be about 2,400 years old. A smaller individual (covering only 40 acres) of a related species, Armillaria bulbosa , which is growing in northern Michigan is thought to be as much as 10,000 years old, which if true, would make it the oldest known living organism on the planet.
Poetry workshop assignment: Write a sonnet from the point of view of that fungus. Make it an acrostic, so that the first letters spell out HUMONGUSFUNGUS. (Or if you must spell humongous properly, make it GREATBIGFUNGUS.) You have 20 minutes.