Treebeard?

Or just an ordinary tree?

" 'Things have changed. [...] Some of us are still true Ents, and lively enough in our fashion, but many are growing sleepy, going tree-ish, as you might say. Most of the trees are just trees, of course; but many are half awake. Some are quite wide awake, and a few are, well, ah, well getting Entish. That is going on all the time.
When that happens to a tree, you find that some have bad hearts. [...] Still, we do what we can. We keep off strangers and the foolhardy; and we train and we teach, we walk and we weed.' " (Treebeard)