Cannabis (/ˈkænəbɪs/) is a genus of flowering plants in the family Cannabaceae. The number of species within the genus is disputed. Three species may be recognized: Cannabis sativa, C. indica, and C. ruderalis. Alternatively, C. ruderalis may be included within C. sativa, or all three may be treated as subspecies of C. sativa, or C. sativa may be accepted as a single undivided species. The genus is widely accepted as being indigenous to and originating from Asia.
The plant is also known as hemp, although this term is often used to refer only to varieties of Cannabiscultivated for non-drug use. Cannabis has long been used for hemp fibre, hemp seeds and their oils, hemp leaves for use as vegetables and as juice. Industrial hemp products are made from cannabis plants selected to produce an abundance of fibre.
The use of cannabis and other drugs came under increasing scrutiny after the formation of the Federal Bureau of Narcotics (FBN) in 1930, headed by Harry J. Anslinger as part of the government's broader push to outlaw all recreational drugs. Anslinger claimed cannabis caused people to commit violent crimes and act irrationally and overly sexual. The FBN produced propaganda films promoting Anslinger's views and Anslinger often commented to the press regarding his views on marijuana.
Image 6Three theories of classification for Cannabis. From left to right, monotypic with three subspecies (A), polytypic consisting of up to three species (B), and single phenotypically diverse species (C). (from Cannabis)
Image 7Cannabis indica fluid extract, American Druggists Syndicate, pre-1937 (from History of cannabis)
Image 8Hemp being grown in Oregon in 2020 (from Hemp)
Image 9Evolution of cultivated cannabis strains. The cultivar, Cannabis ruderalis, still grows wild today. (from Medical cannabis)
Image 15An advertisement for cannabis americana distributed by a pharmacist in New York in 1917 (from Medical cannabis)
Image 16The Chinese character for hemp (麻 or má) depicts two plants under a shelter. Notably, the same character also means "numb". Cannabis cultivation dates back at least 3000 years in Taiwan. (from History of cannabis)
Image 28The use of cannabis, at least as fiber, has been shown to go back at least 10,000 years in Taiwan. "Dà má" (Pinyin pronunciation) is the Chinese expression for cannabis, the first character meaning "big" and the second character meaning "hemp". (from Medical cannabis)
Image 29Comparison of physical harm and dependence regarding various drugs (from Cannabis)
Image 48The Ebers Papyrus (c. 1550 BCE) from Ancient Egypt has a prescription for medical marijuana applied directly for inflammation. (from Medical cannabis)
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