Niphredil
From Tolkien Gateway
Niphredil was a small white flower that grew first at the moment of Lúthien's birth in Doriath. It was also found among the golden trees of Lothlórien, thickest on Cerin Amroth, where some pale green varieties could be seen.
Etymology
The name means "little pallor" (niphred + -il) perhaps referring to its snow-like appearance.