. . . . . . . . . "Pyrgus communis" . . "Centaurea solstitialis" . . "Paul G. Johnson. 2017. Pyrgus communis nectar plant Centaurea solstitialis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/8449035> 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." .