Tree

Trees are the structures created both by the automatic generation of the map, and by players. They are built of trunk blocks and leaves. When generated by the map, they are frequently found in groups, in the style of a forest.

They can be generated in a third way as well. If a shrub is placed in sunlight on a grass block with enough space, a tree will likely grow within several seconds.

This feature was added to Creative Mode in version 0.28_01, but has since been removed due to its griefer-friendly applications ("treespam").
 * Incorrect, the feature remains, however it is a server-specific toggle.