. . . . . . . . . "Parmelia sulcata" . . "Quercus alba" . . "Nova Patch. 2017. Parmelia sulcata host Quercus alba. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6785762> 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." .