Heart of the Wild (herb)

Heart of the Wild is a reagent used by alchemist, engineers, tailors, and jewelcrafters.

Source
This item can be found from plant-based creatures in a variety of verdant zones, never to be found growing wild. This would seem to indicate that it is the driving organ for "walking plants".

Alchemy

 * Living Action Potion
 * Major Rejuvenation Potion

Engineering

 * Green Lens

Tailoring

 * Dreamweave Vest
 * Dreamweave Gloves
 * Dreamweave Circlet

Jewelcrafting

 * Truesilver Healing Ring