Buy 420 Marijuana Indica Strains For Sale. Cannabis indica is an annual plant in the family Cannabaceae. It is a putative species of the genus Cannabis. Whether it and Cannabis sativa are truly separate species is a matter of debate. The Cannabis indica plant is cultivated for many purposes; for example, the plant fibers can be converted into cloth. Cannabis indica produces large amounts of tetrahydrocannabinol (THC). The higher concentrations of THC provide euphoric effects making it popular for use both as a recreational and medicinal drug.