. . . . . . . . . "Betula occidentalis" . . "Pinus jeffreyi" . . "Charlie Hohn. 2014. Betula occidentalis associated species with names lookup Pinus jeffreyi. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/806853> 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." .