Reported to be endemic to the Sinaloa area of Mexico.  Said to loose its spines with age.  Lotusland, Montecito, California.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/92252798@N07">Dick Culbert</a> from Gibsons, B.C., Canada
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/92252798@N07/19882501849/">Ferocactus schwarzii</a>