The Little Shop of Horrors is a 1960 American comedy film directed by Roger Corman. Written by Charles B. Griffith, the film is a farce about an inadequate florist's assistant who cultivates a plant that feeds on human blood. The film's concept is thought to be based on a 1932 story called "Green Thoughts", by John Collier, about a man-eating plant. However, Dennis McDougal suggests that Griffith may have been influenced by Arthur C. Clarke's sci-fi short story from 1956, "The Reluctant Orchid"(which was in turn inspired by the 1905 H. G. Wells story "The Flowering of the Strange Orchid"). Mythology about man-eating plants dates back to at least the 1800s, and probably much earlier.