Ensete ventricosum or the Abyssinian Banana is a very large and leafy perennial herb - probably the largest - which develops as a single trunk (actually its a stem) from which flap giant mid green leaves up to 3.5m long with a red middle rib.
After around 5-7 years it will produce a pendulous spike of flowers that mature as banana type fruits - but they are not edible.
Then after all that effort it dies.