Mitragyna Speciosa – commonly known as Kratom – is an evergreen tropical tree. M.Speciosa grows mainly in areas of Southeast Asia. The natural ecosystems of Indonesia, Malaysia and Thailand are home to most of the 'wild' M.Speciosa. Under the right conditions in these tropical jungles, the height of the plants exceeds 15 meters.
The first written accounts of the use of Kratom by indigenous peoples of Southeast Asia date back 150 years. They reported that chewing the leaves had stimulating effects and greatly helped with hard manual work, while boiling them into tea had analgesic and relaxing effects. Considering that the tree is native to various countries in Southeast Asia, it is a reasonable assumption that its traditional use by local societies has a history of thousands of years.
In the slang of the Thai language, the words "Maeng Da" mean "pimpr". This Asian slang suggests that Maeng Da are of higher quality than other "varieties". It is assumed that the concentrations of mitragynine – one of the main active substances of M.speciosa – are higher in Maeng Da strains compared to other strains. As a rule, the leaves of Maeng Da strains have brown shades.