'Under her song the saplings grew and became fair and tall, and came to flower; and thus there awoke in the world the Two Trees of Valinor. Of all things which Yavanna made they have most renown, and about their fate all the tales of the Elder days are woven.
The one had leaves of dark green that beneath were as shining silver, and from each of his countless flowers a due of silver light was ever falling, and the earth beneath was dappled with the shadows of his fluttering leaves. The other bore leaves of a young green like the new-opened beech; their edges were of glittering gold. Flowers swung upon her branches in clusters of yellow flame, formed each to a glowing horn that spilled a golden rain upon the ground; and from the blossom of that tree there came forth warmth and a great light.'

JRR Tolkien: The Silmarillion: Chapter 1: Of the Beginning Days