Mammillaria spinosissima v. rubispina. 

Mammillaria tezontle. 

Mammillaria uncinata

Mammillaria verhaertiana

Mammillaria wilcoxii

Matucana madisoniorum

Mediolobiva albilongiseta.

Mediolobivia haagei

Mediolobivia nigricans. Cachipampa/Salta HV 992

Mediolobivia pectinata v. huaricensisi.

Mediolobivia species mix

Melocactus azureus. 

Melocactus caesius. 

Melocactus disciformis

Melocactus ernestii. Synonyms: Melocactus oreas, Melocactus erythrancanthus, Melocactus longicarpus, Melocactus florschuetzianus, Melocactus mulequensis, Melocactus azulensis.

Melocactus guitartii. 

Melocactus jansenianus. 

Melocactus lensselinkianus

Melocactus peruvianus v. albispinus

Melocactus species mix. A wide ranging assortment of several varieties.

Micranthocereus auri-azureus. Back ordered items ships in 2-3 weeks.

Micranthocereus densiflorus.

Micranthocereus flaviflorus. Back ordered items ships in 2-3 weeks.

Micranthocereus polyanthus

Micranthocereus streckeri

Mila caespitosa.

Mila churiensis.  Quantities over 100 ships in 2-3 weeks.

Mila pugionifera.

Myrtillocactus chende (Synonyms: Polaskia chende, Cereus chende, Cereus delmoralii, Heliabravoa chende, Lemaireocereus chende) 

Myrtillocactus geometrizans (Blue candle). USDA: 9b-11. Full sun. Heat tolerant. Moderate water. Hardy to 26°F. Grows to 12' tall, branching; 8" diameter. Edible purple berries. Origin: Northern central Mexico.