Yellow flowers of the Arizonan barrel cactus, <i>Ferocactus wislizenii</i>, from Tombstone, Arizona.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/86624586@N00">Kevin Walsh</a> from Oxford, England
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/86624586@N00/10173762/">yellow cactus</a>