. . . . . . . . . "Speyeria callippe" . . "Cirsium occidentale californicum" . . "icosahedron. 2016. Speyeria callippe nectar plant Cirsium occidentale californicum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/3415283> 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." .