Mammillaria elongata subsp. echinaria (DC.) D.R.Hunt, Mammillaria Postscripts 6: 7. 1997
Mammillaria elongata subsp. echinaria, Mammillaria Postscripts 6: 7. 1997
is new combination for Mammillaria echinaria in Mém. Mus. Hist. Nat. 17: 110. 1828
Mammillaria elongata subsp. echinaria, Mammillaria Postscripts 6: 7. 1997