. . . . . . . . . "Systasea pulverulenta" . . "Centaurea melitensis" . . "Bill Lupardus. 2015. Systasea pulverulenta nectar plant Centaurea melitensis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1780134> 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." .