Coryphantha hesteri

Hester's Foxtail Cactus
	;
Scientific classification
Kingdom:	Plantae;
Division:	Magnoliophyta;
Class:	Magnoliopsida;
Order:	Caryophyllales;
Family:	Cactaceae;
Subfamily:	Cactoideae;
Tribe:	Cacteae;
Genus:	Coryphantha; (Engelm.) Lem.
Species:	C. hesteri;
Binomial name
	Coryphantha hesteri;

Coryphantha hesteri is also classified as Escobaria albicolumnaria, Escobaria hesteri or Mammillaria hesteri. Alternative spellings sometimes used are C. hester and C. hesterii.

Wikipedia has an article on Coryphantha.