. . . . . . . . . "Rhytisma acerinum" . . "Acer saccharinum" . . "thismia. 2016. Rhytisma acerinum host plant Acer saccharinum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/4260872> 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." .