The list of vascular plant families and genera containing epiphytic species published by Madison (1977) is updated here. Ten percent (23,456 species) of all vascular plant species are epiphytes. Seven percent (876) of the genera, 19 percent (84) of the families, 45 percent (44) of the orders and 75 percent (6) of the classes contain epiphytes. Twenty-three families contain over 50 dpiphytic species each. The Orchidaceae is the largest family of epiphytes, containing 440 epiphytic genera and 13,951 epiphytic species. Forty-three genera of vascular plants each contain over 100 epiphytic species.