. . . . . . . . . "Pinus rigida" . . "Acer pensylvanicum" . . "Charlie Hohn. 2015. Pinus rigida second associated species with names lookup Acer pensylvanicum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1894155> 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." .