By means of this spell, the character is able to assume the form of a small, living tree or shrub or a large, dead tree trunk with a small number of limbs. The closest inspection cannot reveal that the tree in question is actually a magically concealed creature. To all normal tests the character is, in fact, a tree or shrub, although a detect magic spell reveals a faint transmutation on the tree. While in tree form, the character can observe all that transpires around the character just as if the character were in the character's normal form, and the character's hit points and saves remain unaffected. The character gains a +10 natural armor bonus to AC but has an effective Dexterity score of 1. The character is immune to critical hits while in tree form. All clothing and gear carried or worn changes with the character.

The character can dismiss tree shape as a free action.