. . . . . . . . . "Danaus plexippus" . . "Verbesina alternifolia" . . "mayfly1963. 2015. Danaus plexippus nectar plant Verbesina alternifolia. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1965232> 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." .