The enormous “corpse flower” at the Missouri Botanical Garden is in bloom, emitting the odor for which it is famous.

The corpse flower, known by horticulturists as Amorphophallus titanum or titan arum, is on display at the Missouri Botanical Garden’s Linnean House.

The rare flower blooms only once every year or two.

The garden will hold special evening hours tonight from 6 p.m. to 2 a.m. with the last entry at 1:30 a.m. There will be no charge for the evening hours. For visitors viewing the flower during regular hours, admission to the Missouri Botanical Garden is $8 for adults and free for children ages 12 and under. Members are free.

The flower’s massive inflorescence opens quickly, often in just a couple of hours.

The blooms last about three to five days, with the odor — typically described as smelling like rotting flesh — subsiding in about a day.

The bloom can grow to over 6 feet tall and 3 feet wide.

The garden has hosted the blooming of three titan arums in recent years. The first was on May 19, 2012, followed by a second a month later.

The last time one of the plants bloomed was in October.