chicago art institue Marijuana is a green, brown, or gray combination of dried, shredded leaves, stems, seeds, and flowers from the hemp plant (Cannabis sativa). Cannabis is really a term that is the term for marijuana along with other drugs made from the identical plant. Other types of cannabis include sinsemilla, hashish, and hash oil. All types of cannabis are mind-altering (psychoactive) drugs. The main active chemical in marijuana is THC (delta-9-tetrahydrocannabinol).