Snow-white starlight blooms,
Watch o'er the mighty fallen
who rest in earthen tombs.
Simbelmyne
Simbelmynë was a small white flower that grew in particular abundance on graves and tombs, like the Barrowfield of the Kings of Rohan beneath the walls of Edoras; and most thickly on the grave of Helm Hammerhand.
Tolkien Gateway: Simbelmynë