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Top Cactus
Ariocarpus

Ariocarpus is a genus of cacti. These species are usually referred to as living rocks, though the term is also used for other genera. They are protected in their native country, mostly Mexico. They are avidly sought by collectors. Most species of Ariocarpus grow very slowly. Their flowers by contrast are very striking.

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Ariocarpus Species
Ariocarpus Fissuratus

Ariocarpus fissuratus is a species of extremely slow growing cacti found in rare numbers in Mexico and the southern United States. Commonly called "living rocks," these cacti usually blend in well with the terrain around them. They are greyish-green in color, sometimes taking on a yellowish tint with age.

These cacti consist of many small tubercles growing from a large tap root. They are usually solitary, rarely giving rise to side shoots from old areoles. These cacti are difficult to spot in their natural habitat. When they are found, it is usually due to their pinkish flowers.

Psychoactivity
Ariocarpus fissuratus is a unique species in that is has been used by Native American tribes as a mind altering substance, usually only as a substitute for peyote [1]. While it does not contain mescaline like many other North American cactus species (such as Lophophora williamsii or Peyote), it has been found to contain other mind altering substances, such as N-methyltyramine and Hordenine[2]. This cactus is also commonly referred to as the "False Peyote," "Peyote Cimmaron,"(Spanish,"wild peyote") or simply "Sunami."

Cultivation
In cultivation, Ariocarpus fissuratus is often grafted to a faster growing columnar cactus to speed growth, as they would generally take at least a decade to reach maturity on their own. They require very little water and fertilizer, a good amount of light, and a loose sandy soil with good drainage


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Aztekium Species
Aztekium Ritteri

The genus Aztekium contains only two species of small globular cactus. Discovered in 1929 by F. Ritter, in Rayones, Nuevo León, Mexico, this genus was thought to be monotypic (with Aztekium ritteri) until a second species (Aztekium hintonii) was discovered by George S. Hinton, in Galeana, Nuevo León in 1991.

This genus is found only in Mexico and is native to the state of Nuevo León. Though these two species are much sought after, there remain millions of plants in habitat. It was estimated that there were in the order of tens of millions of plants of A. hintonii, and at present most of its range is pristine. Though A. ritteri has been collected for decades and there has been destruction of its habitat, the number of plants in habitat is several million.[citation needed]

Its name is dedicated to the Aztec people, due to the resemblance between the plant's shape and certain Aztec sculptures.

Description
Aztekium ritteri is a small plant (aroung 20 mm wide), with 9 to 11 ribs, which typically have transverse wrinkles. Its color varies from pale green to grayish-green.

The center of the cactus contains a lot of white wool. Flowers are small (less than 10 mm wide), with white petals and pinkish sepals. The plants bear small pinkish berry-like fruits. A. hintonii is larger, to 10 cm in diameter, 10 to 18 grooved ribs, flowers magenta to 3 cm. It grows only on gypsum.

Cultivation
These species grow extremely slowly, taking around two years to attain 3 mm diameter. They are usually propagated by seeds.

Active constituents
N-methyltyramine
hordenine
anhalidine
mescaline
N,N-3,4-dimethoxy-phenethylamine
pellotine
3-methoxytyramine


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Beaucarnea recurvata

Ponytail's are native to the dry Mexican climate, this habitat allows it to survive interior winter heat very well, as long the plant doesn't receive too frequent waterings, and never allow water to sit in the bottom of the saucer or pot. An interesting fact is that Nolina recurvata stores its water in its base.


A sandy-mix soil generally minimize the probability of root rot, especially compared to the peaty mixes normally used in most tropicals. Specifically, allow the soil to dry well between waterings, and if you have any doubt on whether or not to water the plant, skip it until the next week.

Dry, brown foliage, a shriveled stem or desiccated roots are usually signs of underwatering. If you are overwatering, we normally see light new growth, stem rot or root rot will appear.

Light requirements for ponytails are pretty easy to remember if you think of where it is native to - the Mexico deserts. Provide bright indirect light to full sun. Any window space indoors particularly one facing north will suit the light requirements of this high-light plant. For optimum performance, however, full sun is best.

Generally, the ponytail is insect free, but on occasion does attract mealybugs, spider mites and scale.

Nolina recurvata – the "Ponytail Palm" is a plant to enjoy. You just provide plenty of light and water it less frequently than you think necessary, and this plant will add a unique beauty wherever your use it.

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Euphorbia Species
Euphorbia poissonii

Euphorbia poisonii, also known as Euphorbia poissonii is a highly toxic and succulent member of the large and varied Spurge genus of plants. It is native to northern Nigeria, where local farmers extract its latex for use as a pesticide, potent against any animal that enters the field. Its powerful and painful nature mandates fencing and clear marking of fields using the poison, but the produce is safe to eat as the toxin decomposes after a few days of exposure to air.




Toxic Activity
The active toxin Resiniferatoxin binds to pain receptors in the same way as capsaicin but much more powerfully. It stimulates the neurons to fire repeatedly until the neuron dies, causing searing pain and sending the victim into severe anaphylactic shock.

Due to its selective nature of binding and killing pain receptors while leaving other nerve cells intact, resiniferatoxin is currently being researched as a possible treatment for chronic pain.

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Turbinicarpus
Pelecyphora

Cultivation: It’s a relatively easy species to cultivate, but very slow growing. Needs a very well drained soil. Requires strong sun to part sun to develop good spinal growth and waterings should be rather infrequent, to keep the plant compact and not become excessively elongated and unnatural in appearance. Keep dry in winter, or when night temperatures remain below 10° C (but some people give this plant a light monthly watering to prevent the drying and shedding of the lower tubercles.) it is hardy to -4°C for a short period. Assure a good ventilation.

Propagation: It can be reproduced both by seeds and cuttings, but it is often grafted because difficult and slow to grow on its own roots. Older specimens shoot tillers from under tubercles, so they can be grafted, which is a much easier way of propagation than sowing. Young seedlings are tiny and they need several years to reach adult size, and require very careful watering.

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