These white flowers are called Monotropastrum humile, which is related to the more widespread Ghost Pipe, Monotropa uniflora. They grow in the dark, gloomy forests of Asia. They are a myco-heterotrophic plant, meaning they parasitize the fungi in the soil. Often growing near beech trees, which make up this section of the hidden forest, I think this is a very neat addition to this area. This also ties into the underlying fungal themes that some of the other games have.
So are they real or is this all made up?