WordNet sense 1 (abounding in trees):

woodsy, woody, arboraceous

WordNet sense 2 (covered with growing trees and bushes etc):

wooded

WordNet sense 3 (resembling a tree in form and branching structure):

arboreal, treelike, arborescent, dendroid, arboresque, arboriform, dendriform, dendroidal, tree-shaped

WordNet sense 4 (having many branches):

branchy

WordNet sense 5 (inhabiting or frequenting trees):

tree-living