Mammillaria luethyi is a highly sought-after, miniature cactus endemic to northern Coahuila, Mexico. It is one of the most impressive species within its genus, known for its unique, dense white spines and large, vibrant flowers. Because it is highly susceptible to illegal poaching in the wild, botanical experts keep its specific locations strictly confidential.
Taxonomy of Mammillaria luethyi
Scientific Name
Mammillaria luethyi G.S. Hinton
Synonym(s)
Cryptocarpocactus luethyi
Scientific Classification
Family: Cactaceae
Subfamily: Cactoideae
Tribe: Cacteae
Subtribe: Cactinae
Genus: Mammillaria
Etymology
The generic name "Mammillaria" (pronounced "mam-mil-AR-ee-uh") means "nipple-bearing" and refers to the distinctive nipple-like tubercles that cover the stems of the plants within this genus.
The specific epithet "luethyi" (pronounced "loo-TY-eye") honors Jonas Lüthy, a Swiss botanist with a special interest in the genus Mammillaria and co-discoverer of this species.
Description
Mammillaria luethyi is a small, eye-catching cactus with brownish, ball-shaped stems with cylindrical tubercles densely covered with tiny, white spines. It is one of the most spectacular of all Mammillarias. The subglobose stems grow solitary or in small clusters and can measure up to 0.8 inches (2 cm) in diameter. Each areole bears more than 80 spines.
During most of the summer, Mammillaria luethyi is decorated with large flowers of striking color combinations. The flowers have rich magenta petals that become white towards the base, intense yellow-to-orange anthers, and a greenish stigma. They can reach lengths and diameters of up to 1.2 inches (3 cm) and often completely cover the stems. The cryptocarpic fruits are spherical, yellowish-green to reddish-green, and contain tiny black seeds. They can grow up to 0.2 inches (0.5 cm) in diameter.
Origin
Mammillaria luethyi is native to northern Mexico. It grows among the limestone gravel on flat limestone slabs in the Chihuahuan Desert in northern Coahuila at elevations of about 2,620 feet (800 m).
How to Grow and Care for Mammillaria luethyi
Hardiness: USDA hardiness zones 10a to 11b: from 30°F (-1.1°C) to 50°F (10°C).
Light: For optimal growth, plant Mammillaria luethyi in an area that receives at least 4 hours of direct sunlight per day. If you are growing it indoors, place it near a bright window. For the best results, place it on the balcony or in the garden from spring to fall.
Soil: Use commercial cactus soil or create your own well-draining soil mix to ensure good root aeration and drainage.
Temperature: Mammillaria luethyi is heat-tolerant but not cold-hardy. It grows best in USDA Plant Hardiness Zones 9b to 11b, with average minimum winter temperatures ranging from 25°F to 50°F (-3.9°C to 10°C).
Watering: Water deeply from spring to fall, and wait until the soil dries out before watering again. Never let your pot sit in water, and suspend watering when the plant goes dormant in the winter.
Fertilizing: Mammillaria luethyi benefits from fertilizing during the growing season. Apply a water-soluble fertilizer for cacti and succulents. Suspend feeding during winter, when the plant is dormant.
Repotting: Repot the cactus into a slightly larger pot every two or three years, preferably in late winter or early spring. However, you can repot at any time of year.
Propagation: You can propagate Mammillaria luethyi in two easy ways: 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 for the best results.
Learn more at How to Grow and Care for Mammillaria.
Toxicity of Mammillaria luethyi
Mammillaria luethyi is non-toxic but has sharp spines, so keep it out of reach of children and pets.
Photo Gallery
Click on a photo to see a larger version.
Internal Links
- Explore all plants within the genus Mammillaria.
- Explore all plants within the family Cactaceae.