. . . . . . . . . "Papilio glaucus" . . "Eutrochium fistulosum" . . "Dan Nydick. 2013. Papilio glaucus nectar plant Eutrochium fistulosum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/363089> 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." .