Simbelmynë (Old English for 'evermind') is a white flower that grows in Rohan primarily on the grave mounds of the Kings of Rohan, and most thickly on the burial mound of Helm Hammerhand. The flower is also called evermind, uilos ('snow white'), and alfirin ('immortal') because it blooms all year long. This flower was also found growing in the grass at Gondolin and at the tomb of Elendil.

Legolas also uses the name 'alfirin' to refer to an apparently different type of flower, described as "golden bells", which could be found in Lebennin.