Kratom is the dried and crushed (or powdered) leaves from the species Mitragyna speciosa, a tree which is native to Southeast Asia. The kratom tree is in the same botanical family as the coffee tree. It's been used as a medicinal & recreational herbal drug for thousands of years, and offers stimulant (at low doses), sedative (at higher doses), analgesic, and (yes) euphoric, opiate-like properties.