Cannabis sativa L., commonly known as marijuana, is a species of flowering plant in the genus Cannabis that produces psychoactive compounds called cannabinoids (such as THC). Cannabis has been used for various purposes, including fiber production, hemp oil extraction, medicine, food, and animal products.

 The first evidence of cannabis use dates back to prehistoric times, however, it was not until the 18th century that cannabis became popular. In the early 1900s, cannabis was prescribed as a treatment for morphine addiction, but this practice was stopped due to its potential side effects. In the 1930s, cannabis was re-discovered and began to be used recreationally.

 Today, cannabis is illegal at the federal level, although individual states have varying laws regarding its recreational and medical use. Most countries permit some form of medicinal use, while others prohibit any type of cannabis consumption.

Cannabis is a genus name that belongs to the family Cannabaceae. Cannabis is native to Central Asia and India. In the United States, it was first cultivated in California. Today, cannabis is grown in over 40 countries around the world including Europe, North America, South America, Africa, Australia, and New Zealand.

1. Cannabis sativa L. (marijuana)

 2. Cannabis indica L. (hemp)

 3. Cannabis ruderalis L. (ruderal hemp)

 4. Cannabis afghanica L. (hashish)

 5. Cannabis chinensis L. (Chinese hemp)

 6. Cannabis bahia L. (cannabaceae)

Cannabis sativa L., commonly known simply as marijuana, is a species of flowering plant in the genus Cannabis that produces psychoactive compounds known as cannabinoids (such as tetrahydrocannabinol, or THC). Its production has been documented since ancient times. In 2015, the United Nations' International Narcotics Control Board placed cannabis under Schedule I of the 1961 Single Convention on Narcotic Drugs, making its production, sale, and possession illegal throughout the world.

 The word cannabis comes from two Latin words: canes, meaning “hemp”, and sive, meaning “like”. This name was given to the plant due to its resemblance to hemp, a type of fiber. Hemp is a tall, slender annual herbaceous plant that grows to heights of 1-5 meters (3–16 ft) and has long stalks. It has small leaves and flowers clustered at the top of the stalk.