Balsam Fir. Drawing.
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 63.
1913
<a rel="nofollow" class="external autonumber" href="https://plants.usda.gov/cgi_bin/topics.cgi?earl=plant_profile.cgi&amp;symbol=ABBA&amp;photoID=abba_002_ahp.tif">[1]</a>