The Librarian (Discworld) (Wikipedia)
The Librarian appeared in the second novel of the series, The Light Fantastic, where he was transformed into an orang-utan. This had certain advantages for a librarian, such as being able to use his hands and feet for re-shelving books. The other wizards have gradually become used to the situation, to the extent that, from Night Watch: “if someone ever reported that there was an orang-utan in the Library, the wizards would probably go and ask the Librarian if he’d seen it.”- Cannabis ruderalis (Wikipedia)
Cannabis ruderalis is a variety, subspecies, or species of Cannabis native to Central and Eastern Europe and Russia. It contains a relatively low quantity of psychoactive compound tetrahydrocannabinol (THC) Some scholars accept C. ruderalis as its own species due to its unique traits and phenotypes which distinguish it from C. indica and C. sativa; others debate whether ruderalis is a subdivision under C. sativa.