Corpse flower

It usually blooms once in 4 to 10 years and only for a short period.

An excerpt from the article 10 facts about corpse flower
The blooming takes place within roughly 24 to 36-48 hours. First, the female part of the plant starts blooming, attracting insects with the stench, and on the following night the male phase of the bloom occurs, the stench lessens and pollinators leave, covered in pollen.