. . . . . . . . . "Castor canadensis" . . "Populus trichocarpa" . . "Mart Hughes. 2018. Castor canadensis associated species with names lookup Populus trichocarpa. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/9951885> 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." .