. . . . . . . . . "Papilio rutulus" . . "Erysimum suffrutescens" . . "Lynn Watson, Santa Barbara. 2013. Papilio rutulus nectar plant Erysimum suffrutescens. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/251352> 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." .