Mammillaria longimamma
Scientific Name: Mammillaria longimamma DC.
Synonym: Cactus alpinus, Cactus longimamma, Cactus uberiformis, Dolichothele longimamma, Dolichothele longimamma ssp. uberiformis , Dolichothele uberiformis, Mammillaria alpina, Mammillaria laeta, Mammillaria longimamma, Mammillaria longimamma var. uberiformis , Mammillaria uberiformis, Neomammillaria longimamma, Neomammillaria uberiformis
Family: Cactaceae
Mammillaria longimamma var. longimamma at the desert botanical garden
USDA: 9-11
Frost Tolerance: Hardy to 22°F (-5°C)
Sun Exposure: Light shade to shade
Origin: USA (Texas), Mexico (Hidalgo, Querétaro)
Growth Habits: Solitary or clumping, spherical, green cactus, up to 5 inches in diameter (12 cm)
Watering Needs: Regular water in spring and summer. Keep dry in winter.
Propagation: Seeds, offsets, tubercles
The name longimamma comes from the Latin for "long nipple", while uberiformis which appears in Dolichothele uberiformis means "shaped as an utter".
Blooming Habits:
The Mammillaria longimamma produces an abundance of bright yellow flowers, 2.5 inches in diameter (6 cm), in summer.
Fruiting Habits:
Large 2.5 inches (6 cm) bright yellow flowers.
Culture:
The Mammillaria longimamma has a fairly large tap root, and should be kept in a deep pot. Fertilize every 2 weeks with diluted high potassium fertilizer when the plant is in bud.
Propagation:
Tubercles can be removed from the plant, let to dry a day or 2, and planted.
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