So you are writing a story, add some mushroom, no not for any mood altering ability but becasue mushrooms are an interesting element to a forest or fantasy location. The smell, texture, and sight help to anchor your fictional world to the real world. And mushrooms can be the source of all kinds of wild plants or inspirations for where the mind takes you.
Here are some for the imagination
Amethyst Deceiver (Laccaria amethystina)
Leratiomyces mushroom (new unnamed mushroom found in New South Wales)
Porcelain Fungus (Oudemansiella mucida)