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Lophophora diffusa
False Peyote
Overview
Lophophora diffusa, commonly known as the False Peyote, is a spineless, slow-growing geophytic cactus belonging to the family Cactaceae.
Taxonomy and Naming
First described in the 19th century, Lophophora diffusa is distinguished from its close relative L. williamsii by its yellowish-green epidermis, the lack of well-defined ribs, and its chemical composition, containing predominantly pellotine rather than mescaline 1.
Distribution and Habitat
This species is micro-endemic to a small area in the state of Querétaro and Hidalgo, Mexico 2. It thrives in semi-arid desert shrublands, growing on limestone-rich soils, often sheltered under nurse plants.
Appearance
The stem is soft, globose, and yellowish-green, lacking distinct ribs but possessing diffuse, wavy podaria. The apex is covered in dense tufts of white trichomes (wool), from which small white to light pink flowers emerge during spring and summer.
Cultivation
Cultivation requires an strictly mineral-based substrate with excellent drainage. Watering should be sparse during the active growing season and completely suspended during winter dormancy to prevent root rot.
Common Cultivation Mistakes
Using standard organic potting soil and overwatering are the primary causes of failure, leading to rapid rot. Excessive direct sunlight can also scorch its sensitive, soft-textured epidermis.
References
Watering
14-60 Days
Water very sparingly in summer only when soil is bone dry. Keep completely dry in winter.
Soil
Limestone-rich, highly porous mineral cactus mix
Strictly mineral mix containing pumice, limestone gravel, and very little organic matter.
Safety
Risky for Pets
Contains toxic alkaloids (such as pellotine). Keep away from pets and children.
Difficulty
Hard
Highly sensitive to moisture and prone to rot, making it best suited for experienced growers.
Native Habitat
Mexico (Querétaro, Hidalgo)
Endemic to a highly restricted region of the Queretaro desert in Mexico, where it grows on steep limestone slopes shaded by xerophytic vegetation.
Frequently Asked Questions
How often should I water Lophophora diffusa?
During summer, water roughly every 2 weeks only after the substrate is bone dry. During winter dormancy, keep it completely dry without any water.
Is it toxic to pets?
Yes, Lophophora diffusa contains various psychoactive and toxic alkaloids, including pellotine, and is toxic to pets.
What is the best soil mix?
The soil should be almost entirely mineral. A mix of 80% pumice, lava rock, limestone grit, and 20% sifted cactus soil is ideal.
Why is my cactus getting soft?
Softening usually indicates root rot caused by overwatering or poor drainage. Stop watering immediately and check the roots.
Does it need direct sunlight?
Direct, harsh sunlight can burn its sensitive skin. Filtered bright light or partial shade is highly recommended.
How can I encourage flowering?
To promote spring/summer blooming, the cactus must experience a cool (5-10°C) and completely dry winter dormancy period.
How fast does it grow?
It is an extremely slow-growing species, taking many years to reach maturity from seed.
When should I repot it?
Due to its slow growth, repotting is only necessary every 3-4 years in early spring, using a deep pot to accommodate its taproot.
Can it survive winter outdoors?
It can survive in a sheltered outdoor area if temperatures stay above 5°C and it is kept completely dry, but it must be protected from frost.
How does it differ from Lophophora williamsii?
L. diffusa is yellowish-green, lacks distinct well-defined ribs, and chemically contains mostly pellotine instead of mescaline.