What is Kratom?
Kratom, also known by its scientific name Mitragyna Speciosa, is a large tropical tree that grows throughout various Southeast Asian countries. Kratom is part of the Rubiaceae (or coffee) family of genomes.
The Mitragyna Speciosa trees are quite large, with an average height of 12 to 30 ft and an average girth of 15 ft. The leaves from the Mitragyna Speciosa tree that Kratom is made from are typically an oblong oval shape and dark green in color.
The Mitragyna leaves most frequently either have red stems and veins (red vein Kratom), green stems and veins (green vein Kratom), or white stems and veins (white vein Kratom) inside of them.
While there are other colours of Kratom available such as gold vein Kratom and orange vein Kratom, these are almost always either a red, green, or white vein strain that is processed or dried differently.
Kratom leaves are dried out and ground down into fine powder, which is what is sold commercially today.
Kratom contains over 25 different alkaloids, with Mitragynine being the most dominant hence the name Mitragyna Speciosa.
Information from Wikipedia.org
This was the short answer to 'What is Kratom?' but it covers the basics.