"In the time before The Fall, the world was vibrant, teeming with life. The Fall changed the world and only a portion of what was has survived.
"In their wisdom, the Ancient Ones foresaw the Extinction and took steps to preserve trees by carefully packaging them and hiding them within chests around the world. It is tragic that, for all the good they did, the Ancient Ones could not save themselves..."
Ancient Trees adds thirteen species of extinct trees to your world. You may find the rare saplings in chests hidden throughout the land. You can find them and restore the species... Each species can be used to make the full range of woodcraft - Description from the original Mod Page
Since the mod is public domain and it's original author won't update it, you can find the legacy versions for MC 1.8+ here.
For the 1.7 one go to the original Mod Page
ATTENTION: THIS MOD HAS BEEN RETIRED
Due to an incompatablity with Minecraft 1.12, I stopped working on this mod. If you encounter a bug or a crash I'll fix it, but there will be no updates for Minecraft 1.12+
REQUIRES: KORE SAMPLE