. . . . . . . . . "Speyeria cybele" . . "Asclepias purpurascens" . . "Chuck Sexton. 2011. Speyeria cybele nectar plant Asclepias purpurascens. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/4781558> 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." .