Werewolf Of London (1935)

Wilfred Glendon (Henry Hull) is a wealthy and world-renowned English botanist who journeys to Tibet in search of the extremely rare selenotropic plant known as mariphasa lupine lumina. While there, he is attacked and bitten by a creature later revealed to be a werewolf, although he succeeds in acquiring a specimen of the mariphasa. Once back home in London he is approached by a fellow botanist, Dr. Yogami (Warner Oland), who claims to have met him in Tibet while also seeking the mariphasa. Yo...