Mammillaria longimamma DC.
Finger Cactus, Finger Mound, Long Nipple Cactus, Nipple Cactus, Pineapple Cactus
Cactus alpinus, Cactus barlowii, Cactus longimamma, Cactus uberiformis, Dolichothele longimamma, Dolichothele longimamma f. gigantothele, Dolichothele longimamma f. globosa, Dolichothele longimamma subsp. uberiformis, Dolichothele longimamma var. globosa, Dolichothele uberiformis, Mammillaria alpina, Mammillaria barlowii, Mammillaria gigantothele, Mammillaria globosa, Mammillaria hexacentra, Mammillaria laeta, Mammillaria longimamma f. globosa, Mammillaria longimamma f. hexacentra, Mammillaria longimamma f. uberiformis, Mammillaria longimamma subsp. gigantothele, Mammillaria longimamma var. congesta, Mammillaria longimamma var. globosa, Mammillaria longimamma var. hexacantha, Mammillaria longimamma var. longimamma, Mammillaria longimamma var. uberiformis, Mammillaria longimanna, Mammillaria uberiformis, Mammillaria uberiformis var. gracilior, Mammillaria uberiformis var. hexacentra, Neomammillaria longimamma, Neomammillaria uberiformis
This species is native to Mexico. It grows on limestone or volcanic soils under low shrubs and sparse vegetation in Guanajuato, Hidalgo, and Querétaro at elevations between 3,300 and 7,900 feet (1,000 and 2,400 m).
Mammillaria longimamma is a small cactus with green stems covered with long tubercles tipped with scant white wool and a cluster of spines. It grows either solitary or in a dense clump. Stems are spherical and up to 4.8 inches (12 cm) in diameter. Each areole bears 8 to 10 radial spines and usually one central spine. The radial spines are yellowish-white or brown and up to 0.8 inches (2 cm) long. The central spine is similar to radial spines and is up to 1 inch (2.5 cm) long. This cactus blooms profusely with large bright yellow flowers from late spring to early summer. Flowers are funnel-shaped, up to 2.4 inches (6 cm) long, with a diameter equal to the length. Fruits are club-shaped and yellowish-green.
The specific epithet "longimamma (lon-jee-MAM-muh)" means "long breast" and refers to the finger-like tubercles. It is a compound of the Latin words, the adjective "longus," meaning "far, long" or "extended, prolonged," and the noun "mamma," meaning "breast."
How to Grow and Care for Mammillaria longimamma
Light: Plant this cactus in an area of your garden that receives 4 hours of direct sunlight a day. If you are growing M. longimamma indoors, place it near the brightest window in your home or office to ensure your cactus gets enough light. If possible, place the pot on the balcony or in the garden for extra light from spring to fall.
Soil: M. longimamma requires a soil mix that provides root aeration and good drainage, whether grown outdoors or indoors. Use a commercial cactus potting mix or create your own.
Temperature: This cactus is heat tolerant, but it is not a cold-hardy plant. M. longimamma can withstand temperatures as low as 25 °F (-3.9 °C). USDA Plant Hardiness Zones 9b to 11b, 25 to 50 °F (-3.9 to 10 °C).
Watering: From spring to fall, water deeply and wait for the soil to dry out before watering again. Never let the pot sit in water. Suspend watering in the winter.
Fertilizing: M. longimamma can benefit from fertilization during the growing season. Apply a water-soluble fertilizer for cacti and other succulents. Suspend feeding during the winter when the plant goes dormant.
Repotting: Repot every two or three years into a slightly larger pot. The best time to repot your M. longimamma is late winter or early spring, but the repotting process can be done almost any time of the year.
Propagation: There are two easy ways to propagate M. longimamma: by seeds or by dividing offsets. The best time to remove offsets is in spring and summer. Sow the seeds in late spring or summer.
Learn more at How to Grow and Care for Mammillaria.
Toxicity of Mammillaria longimamma
M. longimamma is considered non-toxic to both humans and pets.
- Back to genus Mammillaria
- Succupedia: Browse succulents by Scientific Name, Common Name, Genus, Family, USDA Hardiness Zone, Origin, or cacti by Genus
Click on a photo to see a larger version.