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Mammillaria corollaria

Corolla Pincushion Cactus

Overview

Mammillaria corollaria is a highly sought-after, geometrically pleasing cactus species belonging to the diverse genus Mammillaria within the Cactaceae family 1. It is characterized by its organized spine patterns and a crown-like ring of blossoms that forms around its apex.

Taxonomy and Naming

Scientifically described as Mammillaria corollaria, the specific epithet refers to the 'corolla' or crown-like arrangement of its flowers. While closely aligned with other species of the Mammillaria coronaria group, it retains distinct taxonomic identity in expert databases 2.

Distribution and Habitat

This species is native to the semi-arid, mountainous regions of Central Mexico. It typically thrives in limestone crevices, rocky outcroppings, and gravelly slopes where water drains away instantly 1.

Morphology

The stem is solitary, globose to shortly cylindrical, with a rich green epidermis. Radial spines are numerous, creamy white to brownish, densely covering the plant body. In late spring, small, vibrant pink to reddish flowers emerge in a perfect circular ring near the top 2.

Cultivation

It requires full sun and exceptionally porous mineral soil. Watering should be sparse, adhering to the 'soak and dry' method. During its winter dormancy, the soil must be kept completely dry in a cool environment.

Common Mistakes

Overwatering and using heavy, peat-rich soils are the main causes of failure. Poor drainage quickly triggers root rot, especially during cold winter months.

Bibliography

References

  1. Hunt, D. (2006). The New Cactus Lexicon. DH Books. ↩
  2. Pilbeam, J. (1999). Mammillaria: The Cactus File Handbook. Nuffield Press. ↩
Light

Direct Sun

Requires bright, direct sunlight to maintain compact growth and spines.

Watering

10-30 Days

Water only when soil is completely bone-dry. Reduce to zero in winter.

Soil

Well-draining, pumice and coarse sand grit cactus mix

Requires a gritty, mineral-heavy cactus soil mix with high drainage.

Safety

Pet Friendly

Non-toxic, but sharp spines require careful handling.

Difficulty

Easy

Very easy if kept dry and sunny; highly susceptible to overwatering.

Native Habitat

Mexico

Endemic to the high-altitude rocky regions of central Mexico, growing alongside xerophytic scrub in dry habitats.

Frequently Asked Questions

How often should Mammillaria corollaria be watered?
Water only when the soil is completely dry (about every 10 days in summer) and keep almost entirely dry during winter dormancy.
Is this cactus toxic to pets?
It is non-toxic. However, the sharp spines pose a physical hazard to curious pets.
How do you encourage Mammillaria corollaria to bloom?
Provide a cool (5-10°C) and completely dry dormancy period in winter to trigger spring bud development.
What soil mix should be used?
A highly porous cactus mix containing coarse sand, pumice, perlite, and a minimal amount of peat should be used.
What happens if it does not receive enough light?
It will undergo etiolation, meaning it stretches towards the light, becomes pale, and produces weak spine growth.
How fast does it grow?
Mammillaria corollaria is a slow-growing cactus species, taking several years to reach mature size.
When should it be repotted?
Repotting is typically done every 2-3 years in early spring when the roots have fully outgrown the container.
Can it be left on a balcony during winter?
It should not be left outdoors in freezing areas. Keep it dry in a protected space at a minimum of 5°C.
How do you save a rotting cactus?
If rot is at the base, cut the healthy top section with a clean knife, allow it to callus, and then re-root it in dry soil.
How should it be fertilized?
Apply a half-strength, high-potassium cactus fertilizer once a month during the active spring and summer growth.