Origin and Habitat: Garden origin.

• Mammillaria longimamma f. cristata hort.
• Cactus longimamma f. cristata hort.
• Dolichothele longimamma f. cristata hort.
• Neomammillaria longimamma f. cristata hort.

• Mammillaria longimamma DC.
• Cactus longimamma (DC.) Kuntze
• Dolichothele longimamma (DC.) Britton & Rose
• Neomammillaria longimamma (DC.) Fosberg
• Mammillaria alpina Mart. ex Salm-Dyck
• Cactus alpinus Kuntze
• Mammillaria longimamma f. cristata hort.
• Cactus longimamma f. cristata hort.
• Dolichothele longimamma f. cristata hort.
• Neomammillaria longimamma f. cristata hort.
• Mammillaria longimamma var. gigantothele O.Berg in C.F.Först.
• Dolichothele longimamma var. gigantothele (O.Berg) R.T.Craig
• Dolichothele longimamma f. gigantothele (O.Berg) Krainz in Krainz
• Mammillaria longimamma var. uberiformis (Zucc.) K.Schum.
• Cactus uberiformis (Zucc.) Kuntze
• Dolichothele longimamma subs. uberiformis (Zucc.) Krainz
• Dolichothele uberiformis (Zucc.) Britton & Rose
• Mammillaria longimamma f. uberiformis (Zucc.) Schelle
• Mammillaria uberiformis Zucc. in Pfeiff.
• Neomammillaria uberiformis (Zucc.) Fosberg
• Mammillaria longimamma f. variegata hort.
• Cactus longimamma f. variegata hort.
• Dolichothele longimamma f. variegata hort.
• Neomammillaria longimamma f. variegata hort.

Description: This is a very nice crested Mammillaria, easily recognizable for its long soft fresh green tubercle.
Stem: Very fat (quite large for a crested plant ( 8 to 10 cm thick) it can form in age a large convoluted mound.
Spines: 8 to 10 all quite similar in shape, thin, needle like, yellow to amber coloured up to 20 mm long, of which one central spine slightly longer (up to 25 mm long)
Flowers: Very large for this genus, 4-6 cm. long, 4.5-6 cm. wide with bright yellow petals in May-July.
Remarks: The cause of cresting is not fully explained. Biologists disagree as to why some plants grow in this unusual form. Some speculate that it is a genetic mutation. Others say it is the result of a strike of lightning or freeze damage, but whatever the stimulus, the growth point of the stem has switched from a geometric point, to a line, which folds and undulates as the crest expands. Though these crested M. longimamma are very rare, cresting occurs naturally, and can be encountered in many other cactus species.

Cultivation and Propagation: The grafted plants are easy to grow and will form a large brain-like mounds with age. Watering during the active growing season (spring and summer); this will encourage steady growth, and prevent the large tubercles from becoming flabby.
The plants on their own roots has fairly large tuberose roots, and should be kept in a deep pot with a very draining mineral substrate. But be particularly careful with watering, which all thick rooted species require (rot sensitive). Keep dry during the winter rest, when the plant may pull near the surface of the potting mix.
Propagation: Grafting or stem cutting.