Ancistrocactus scheeri
<bdi><a href="https://en.wikipedia.org/wiki/en:Mary_Emily_Eaton" class="extiw" title="w:en:Mary Emily Eaton"><span title="British botanical illustrator">Mary Emily Eaton</span></a>
</bdi>
<a rel="nofollow" class="external free" href="http://ravenel.si.edu/botany/botart/viewPlates.cfm?myfamily=Cactaceae">http://ravenel.si.edu/botany/botart/viewPlates.cfm?myfamily=Cactaceae</a>