. . . . . . . . . "Speyeria cybele" . . "Asclepias tuberosa" . . "D. Tilson. 2010. Speyeria cybele nectar plant Asclepias tuberosa. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/7537795> 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." .