Distribution map for <b><a href="//commons.wikimedia.org/wiki/Category:Abies_concolor" title="Category:Abies concolor"><i>Abies concolor</i></a></b> (Gord. &amp; Glend.) Lindl. ex Hildebr. (<a href="https://en.wikipedia.org/wiki/Abies_concolor" class="extiw" title="w:Abies concolor">White Fir</a>).  
<ul><li>Green = <a href="//commons.wikimedia.org/wiki/Category:Abies_concolor_subsp._concolor" title="Category:Abies concolor subsp. concolor"><i>Abies concolor</i> subsp. <i>concolor</i></a>.</li>
<li>Blue = <a href="//commons.wikimedia.org/wiki/Category:Abies_concolor_subsp._lowiana" title="Category:Abies concolor subsp. lowiana"><i>Abies concolor</i> subsp. <i>lowiana</i></a>.</li></ul>
Elbert L. Little, Jr., U.S. Department of Agriculture, Forest Service, and others
1971
<a rel="nofollow" class="external text" href="https://esp.cr.usgs.gov/data/little/">USGS Geosciences and Environmental Change Science Center, Digital Representations of Tree Species Range Maps from "Atlas of United States Trees" by Elbert L. Little, Jr. (and other publications)</a>