Cannabis is one of the most popular plant species on earth. It is being used for both medicinal and recreational purposes.  Origin  Cannabis is a hemp plant whose origins can be traced back to India. The cannabis plant has several varieties, the most popular of which is the Cannabis indica & the Cannabis sativa. Since this plant has spread worldwide, it is known by many names. The most common terms are pot, grass & weed. Other lesser-known names of cannabis are ganja, ...