The several races categorized as Nature Folk, all come from a place called the Grove of Ancients. A millennia-old grove, protected by creatures of the woods, and druids alike. It's located in the easternmost part of the Moonsong Woods.
Ghoran's look quite similar to Humans, except their bodies, are made of plants. Vines make up their veins and bark and leaf their skin. Their 'flesh' is actually quite a delicacy. Ghoran's can rebirth themselves by expelling a seed from their chest, which will then grow into a copy of themselves. This makes them practically immortal. However, they can not procreate in any fashion. Meaning that with each death, their numbers become less.
Treants are giant trees, that can walk. That's pretty much it. Their size can differ from small to huge. Each Treant can be categorized as an actual type of tree. Such so that their leaves and branches are distinguishable.
See: Cherryscrub, Nature Folk, Conclave of Ancients, Heroes of Goldcrest