Kratom is a medicinal leaf taken from tall trees of Southeast Asia. This is used as a stimulant for pain relief. Find the detailed information right here! Kratom or Mitragyna Speciosa, it’s binomial name, is part of the Rubiaceae family also know as the coffee family. It’s a medicinal leaf taken from tall trees in Southeast Asia such as Thailand, Malaysia and Indonesia. First officially documented by Pieter Korthals, an official Dutch botanist, sometime in the 1830s.