Mammillaria hutchisoniana subsp. louisae (G.E.Linds.) D.R.Hunt, Mammillaria Postscripts 6: 5. 1997
Mammillaria hutchisoniana subsp. louisae, Mammillaria Postscripts 6: 5. 1997
is new combination for Mammillaria louisae in Cact. Succ. J. (Los Angeles) 32: 169. 1960