Natural distribution map for <i>Abies lasiocarpa</i> (Subalpine Fir), showing subspecies
<ul><li>Dark grey - <i>Abies lasiocarpa</i> subsp. <i>lasiocarpa</i></li>
<li>Green - <i>Abies lasiocarpa</i> subsp. <i>bifolia</i></li>
<li>Violet - <i>Abies lasiocarpa</i> subsp. <i>arizonica</i></li></ul>
Elbert L. Little, Jr., of the U.S. Department of Agriculture, Forest Service
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: Elbert L. Little, Jr. (1971), <i>Atlas of United States trees, <b>Vol. 1</b>, conifers and important hardwoods</i>: U.S. Department of Agriculture Miscellaneous Publication 1146, 9 p., 200 maps.</a>