. . . . . . . . . "Papilio cresphontes" . . "Asclepias purpurascens" . . "Erik Attaway. 2017. Papilio cresphontes nectar plant Asclepias purpurascens. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6704904> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .