From Tolkien Gateway

Lissuin was a fragrant flower of Tol Eressëa, and was said to bring the heart ease. It was one of the types of flowers brought by a ship of the Eldar to Númenor to grace the wedding of Aldarion and Erendis.[1]

Etymology[edit | edit source]

The name is related to the Quenya word lissë meaning "sweet".[2]