Many of the details, such as the Tower of Maidens (i.e. harem), eunuch guards, and the odalisques (white slavery) derive from material carried to the west via The Arabian Nights. The frame tale of The Nights (the king “re-marries” every night) is reflected in a plot element (“the king re-marries every year”) in Floris and Blancheflour.
The tale could be originally French, or possibly of Oriental origins, or a synthesis of motifs. Kathleen Coyne Kelly, in her essay “Bartering of Blauncheflur,” summarized the discussion of the sources as follows: “Scholars disagree as to whether Floris and Blauncheflur is an oriental tale that was adapted for Western audiences, or a tale whose European author simply supplied it with an oriental setting.”
Compared to other medieval romances, the story has not frequently been brought to the screen. In 1978 Fabrice Luchini and Arielle Dombasle (photo) portrayed Floris and Blancheflour in Perceval le gallois by Éric Rohmer.