. . . . . . . . . "Pieris marginalis" . . "Lithophragma heterophyllum" . . "Robin Agarwal. 2015. Pieris marginalis eating Lithophragma heterophyllum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1270018> 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." .