Laurelin ("Golden Tree" in Quenya. Its name in Valarin is Tulukhedelgorûs) was the Golden Tree of Aman, the mate of Telperion, and the younger of the Two Trees of Valinor. Laurelin was created by the Vala Yavanna and Nienna on the hill of Ezellohar. From that hill Laurelin and Telperion shed their light on the realm of the Valar in the long years before the making of the Sun and Moon.
The Golden Tree was destroyed by the monster Ungoliant during the theft of the Silmarils, which caused the Darkening of Valinor. The creation and destruction of Laurelin and Telperion marked the beginning and ending of the Years of the Trees, before the First Age of Middle-earth.
According to legend, in the future there will be a "Final Battle" (the Dagor Dagorath), in which Morgoth is utterly defeated and evil is banished, and the light of the Silmarils will be used to create the Two Trees once more.