Kelsey & DaytonMamillopsis senilis (Lodd.

Weber) Britton & RoseCactus senilis (Lodd.

ex Salm-Dyck) Kuntze Mammillaria senilis is a species of cacti in the tribe Cacteae.

[1] It is native to Mexico, where it is found in the states of Chihuahua, Durango, Jalisco, Nayarit, Sinaloa and in south Zacatecas.

They form large red flowers that range from 5.5 to 6 centimeters in diameter.