. . . . . . . . . "Colias eurytheme" . . "Symphyotrichum" . . "Erik Attaway. 2016. Colias eurytheme nectar plant Symphyotrichum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/4580054> 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." .