From Halopedia, the Halo wiki
The Banyan tree is a tree that grows to at least one hundred meters tall. Its titan branches are able to hold structures and objects such as observation platforms. The tree was also known to be able to have thick draping vines.
Banyan trees have been seen in the following places:
There was a large Banyan tree in Brume-sur-Mer, Meridian that was used as the spot where Victor Gallardo usually meets Evelyn Rousseau near Rousseau's neighborhood. In 2548, Evelynn and Victor saw a Sardans cat clinging to the branches of the tree before lightning scared it off, leaving them confused why the cat was even there in the first place.
List of appearances