A strain is the variety of plant within a species. Strains define a specific cannabinoid profile: the mixture of THC, CBD and other elements within it. Each strain has its own physical characteristics, or phenotypes, such as height, leaf structure and color. Depending on the strain and its corresponding cannabinoid profile, the plant will deliver varying effects and possible benefits. Strains can be pure Sativas, Indicas or a hybrid of the two.