Parodia herteri

This specimen is 21 years old.
Critically endangered species

Scientific classification
Kingdom:Plantae
(unranked):Angiosperms
(unranked):Eudicots
(unranked):Core eudicots
Order:Caryophyllales
Family:Cactaceae
Subfamily:Cactoideae
Tribe:Notocacteae
Genus:Parodia
Species:P. herteri

From my collection.

via Flickr http://ift.tt/2CzE0bi