Astrophytum ornatum from my collection.
<a href="//commons.wikimedia.org/wiki/User:%D0%A1%D0%BA%D0%B0%D0%BC%D0%BF%D0%B5%D1%86%D0%BA%D0%B8%D0%B9" title="User:Скампецкий">Скампецкий</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>