An esani is a flower found on Bajor.
History and specifics
In 2374, Odo pretended to be interested in esani sold by a florist on Deep Space 9's Promenade when he was following Mexh Brixhta. (DS9 novel: Hollow Men)
In 2376, Elias Vaughn obtained several esani flowers from Quark for Opaka Sulan. (DS9 - Worlds of DS9 novel: Bajor: Fragments and Omens)