Amanita muscaria (Fly agaric) This highly visible, coniferous-mychorhyzial mushroom is probably humanity's oldest entheogen. It has been identified as the "Soma" of the ancient Rig Veda.
Erythroxylum coca (Coca) The leaves of the coca plant are chewed socially throughout the South American andes as a stimulant and to protect against the effects of high elevation