Cannabis Sativa is a flowering plant. First classified in 1753, it has gone on to have many uses, from cooking to painting to, of course, smoking. Cannabis contains psychoactive component, THC, that has long been used as spiritual and medical tools. The dried flowers are called marijuana. Marijuana, or weed or pot, was outlawed in the US in the mid 20th century. Advocates have been attempting to reverse the legislation and stigma ever since with some major successes in more recent years. This vintage poster from the late 60s, printed on uncoated paper with a few pinholes in great condition, shows a scientific drawing of a cannabis sativa plant.