At the end of the Ages of Stars, Lúthien was born to Melian the Maia and King Thingol in the woodlands of Neldoreth in Beleriand. At the same time, the flower Niphredil came to the woodlands to greet the fair Lúthien, who was the most beautiful being to ever walk the face of Middle-Earth. This flower was said to be a star of Earth, as was said about Lúthien as well.
In the Third Age, the white flower grew still in the golden wood of Lothlórien, where it thrived together with the yellow flower Elanor. The fairest Elf-maiden of that time, Arwen Undómiel, who was descendant of Lúthien and shared her love for a mortal man, pledged her troth to Aragorn the Dúnedain in Lothlórien and many years later, Arwen chose to return to die in a bed of those white and gold flowers.