<i>Caltha leptosepala</i>, <a href="//commons.wikimedia.org/wiki/Yellowstone_National_Park" title="Yellowstone National Park">Yellowstone National Park</a>
Unknown author<span style="display: none;">Unknown author</span>
1967
<a rel="nofollow" class="external free" href="http://www.nps.gov/archive/yell/slidefile/plants/buttercupfamily/Page-1.htm">http://www.nps.gov/archive/yell/slidefile/plants/buttercupfamily/Page-1.htm</a>