an Entity references as follows:
The Fraser fir (Abies fraseri) is a species of fir native to the Appalachian Mountains of the Southeastern United States. Abies fraseri is closely related to Abies balsamea (balsam fir), of which it has occasionally been treated as a subspecies (as A. balsamea subsp. fraseri (Pursh) E.Murray) or a variety (as A. balsamea var. fraseri (Pursh) Spach).