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Loxanthocereus hoxeyi

Hoxey's Loxanthocereus

Overview

Loxanthocereus hoxeyi is an endemic cactus species native to the arid valleys of Peru, characterized by its subshrubby, clustering growth habit and vibrant tubular flowers 1.

Taxonomy and Naming

The species was named in honor of the British cactus enthusiast and explorer Paul Hoxey, who made significant contributions to the study of Andean cacti 2. It belongs to the genus Loxanthocereus, which is highly valued for its specialized floral ecology.

Natural Distribution and Habitat

Endemic to western South America, specifically Peru, this species thrives in dry shrublands and rocky desert environments 3. It is found clinging to steep canyon walls and gravelly slopes where drainage is instantaneous.

Appearance

The stems are slender, cylindrical, light green, and densely covered with fine needle-like spines. The striking flowers are asymmetrical, tubular, and bright red to orange, adapted for hummingbird pollination.

Care in Cultivation

It requires a mineral-rich, porous soil medium and excellent air circulation. Water thoroughly in summer only after the substrate has dried out completely, and keep virtually dry in winter.

Common Cultivation Mistakes

Overwatering during the winter rest period and using heavy, organic peat-rich soils are the main causes of root rot. Lack of sufficient light leads to weak, etiolated growth.

References

  1. Plants of the World Online (POWO), Royal Botanic Gardens, Kew. ↩
  2. Charles, G. (2010). 'Loxanthocereus hoxeyi: a new species from Peru'. Cactaceae Systematics Initiatives. ↩
  3. GBIF (Global Biodiversity Information Facility) data portal. ↩
Light

Bright Indirect Light

Bright, indirect sunlight or filtered morning sun. Avoid harsh direct midday sun.

Watering

10-30 Days

Allow the substrate to dry out entirely between waterings. Suspend watering in winter.

Soil

High-drainage cactus potting mix with pumice and coarse sand

Highly mineral, fast-draining potting soil mixed with pumice, perlite, and coarse sand.

Safety

Contact/Ingestion Risk

Non-toxic chemically, but the sharp spines pose a physical hazard to pets and small children.

Difficulty

Moderate

Requires careful water management and excellent drainage, making it moderately easy to care for.

Native Habitat

Peru

Found naturally in the steep, gravelly valleys and dry shrublands of Peru, adapted to low rainfall and intense highland light.

Frequently Asked Questions

How often should Loxanthocereus hoxeyi be watered?
Water only when the soil is completely dry, roughly every 10 days in summer. In winter, withhold water almost entirely.
Is it toxic to pets?
It is chemically non-toxic, but the sharp spines present a physical risk of injury to inquisitive pets.
What is the best soil mix for this plant?
Use a highly mineral cactus soil mix consisting of 60-70% pumice, perlite, and coarse sand for perfect drainage.
How much sunlight does Loxanthocereus hoxeyi need?
It requires at least 5-6 hours of bright, filtered sunlight daily, but should be protected from intense, direct midday sun.
When should I repot this cactus?
Repot every 2-3 years in early spring, choosing a slightly larger container with adequate drainage holes.
How should I protect it from cold in winter?
Keep it in a cool, dry indoor room where temperatures do not drop below 5°C during the winter months.
How can I encourage flowering?
Ensure the plant experiences a dry, cool winter dormancy period and receives ample sunlight during the summer growth season.
Is it a fast-growing cactus?
No, it has a slow to moderate growth rate, typical of many columnar-type Andean cacti.
What causes yellowing or softening at the base?
This is usually a sign of root rot from overwatering. Cease watering immediately and inspect the root system.
Should I fertilize this cactus in summer?
Yes, apply a half-strength, high-potassium cactus fertilizer once a month during the active spring and summer growth period.