Illustration of <i><a href="//commons.wikimedia.org/w/index.php?title=Burmannia_biflora&amp;action=edit&amp;redlink=1" class="new" title="Burmannia biflora (page does not exist)">Burmannia biflora</a></i> (northern bluethread) from Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 547.
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada. Vol. 1: 547.
Created 1913. Upload 06-25-2007
<a rel="nofollow" class="external autonumber" href="https://plants.usda.gov/gallery/pubs/bubi_001_pvd.tif">[1]</a>