‘Bishop’s cap cactus’
Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Eudicots
(unranked):Core eudicots
Order:Caryophyllales
Family:Cactaceae
Genus:Astrophytum
Species:A. myriostigma
From my collection.
via Flickr http://ift.tt/2EIMNnR