Cephalomammillaria micromeris var. greggii (Engelm.) Frič in Ceskoslov. Zahradn. Listy 1924: 120. 1924
Cephalomammillaria micromeris var. greggii in Ceskoslov. Zahradn. Listy 1924: 120. 1924
is correct spelling for Cephalomamillaria micromeris var. greggii in Ceskoslov. Zahradn. Listy 1924: 120. 1924
is new combination for Mammillaria micromeris var. greggii in Proc. Amer. Acad. Arts 3: 261. 1856