In Dark Souls, what is the name of the massive tree that serves as the entrance to Ash Lake?

In Dark Souls, the Great Hollow is the massive tree that serves as the entrance to Ash Lake.

The Great Hollow is an optional area branching from Blighttown. Its interior is a vertical descent through giant branches, fragile platforms, and hostile mushroom creatures. Reaching the bottom leads to Ash Lake, a secluded shoreline beneath a vast open sky and the remains of the ancient Everlasting Dragons.

The area is easy to overlook because its entrance is hidden behind an illusory wall near the swamp. It is also dangerous to navigate because many platforms can cause a fatal fall. Blighttown is the surrounding region, not the tree itself, while Ash Lake is the destination beyond the Great Hollow rather than its entrance.