Myconid
Myconids are a race of mushroom-men native to the Underdark. Unlike most things that live down under the surface of the typical Dungeons & Dragons world, myconids don't want to kill. They don't want to enslave. They don't to take your stuff. They just wish to be left alone to farm fungus, use hallucinagenic spores to engage in mass shared drug-dreams for fun, and rear the next generation of their people.
That said, they are willing to defend themselves, and as much as they sound like a band of hippies, they can be quite dangerous. Particularly in 4th edition, they can breed really quickly, which prompts other races of the Underdark to be particularly hostile towards them.
For their AD&D lore, see here: http://www.lomion.de/cmm/myconid.php