. . . . . . . . . "Pieris rapae" . . "Dittrichia graveolens" . . "Steve Daniels. 2017. Pieris rapae observed species association: pollination Dittrichia graveolens. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/8265843> 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." .