Mallorn

Mallorn trees are native to the Lothlórien biome, but can be grown outside of the biome if their saplings are collected. Golden leaves drift from their canopies during the day, and the mallorn torches on the sides of the silver trunks light up the forest at night with a magical glow.

Some Mallorn trees grow much higher, with thicker trunks and enormous overshadowing canopies, and these larger trees usually play host to an Elf House. There is now a way to make larger trees, as of Beta 21.

When trying to cut down Mallorn trees with a negative Galadhrim alignment, there is a chance you may be attacked by Galadhrim Warriors.

Making
As of Beta 21, large mallorn trees are now craftable with a 5x5 square of mallorn saplings on Quendite Grass. Repeatedly using bonemeal on any one of the saplings will cause the tree to grow immediately, as usual.