Mammillaria microhelia var. microheliopsis (Werderm.) Backeb. in Blätt. Kakteenf. 1937(2): 4. 1937
Mammillaria microhelia var. microheliopsis in Blätt. Kakteenf. 1937(2): 4. 1937
is new combination for Mammillaria microheliopsis in Notizbl. Bot. Gart. Berlin-Dahlem 11: 278. 1931