. . . . . . . . . "Pontia occidentalis occidentalis" . . "Symphyotrichum robynsianum" . . "Barbara Charlton. 2011. Pontia occidentalis occidentalis associated species with names lookup Symphyotrichum robynsianum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/7192449> 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." .