"The Dark Flower" is a legendary novel by the British writer John Galsworthy. The novel follows the life story of Mark Lennan, his love, and his passions. The story introduces Mark as an 18-year-old undergraduate studying art at Oxford and ends 30 years later with Mark ostensibly happily married yet torn between his wife and a beautiful teenage girl—the last and most disturbing manifestation of the "dark flower" of passion.