. . . . . . . . . "Pyrgus oileus" . . "Youngia japonica" . . "Monica Krancevic. 2015. Pyrgus oileus nectar plant Youngia japonica. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1584995> 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." .