The Burning Leaf
This is a person (almost always one of the Forest People) who has the ability to shape plants into useful items. The more complicated the desired result, the longer the transformation takes; the more drastic the change, the more energy needed from the mancer to complete it. They can turn a stump into a shield, or a leaf into a hat, or branch into a staff. Their power only works with living plants—once the plant is “dead”, it ceases to be malleable by arbormancy. Thus the mancer has to shape the branch before picking it from the tree. Also, the material must remain true to its nature: wood doesn’t become soft, and leaves and vines don’t become rigid.