Closing Sale for Retail Plants

We are closing down our retail plant sales at the nursery and are having an fast and easy plant “going out of business” sale on May 14 – 15, 2011.

datura-200
All of the plants listed below are 10 pesos each and must be picked up at the nursery. We also have available larger specimens of some of our rarer plants that are considerably more expensive.

Sales by appointment only. EMAIL ojorojo@xplanta.com for questions or appointments. We need to clear out these plants by mid May.

After this sale we will be focusing on only wholesale plant sales and wholesale and retail seed sales and our own personal collection of rare plants.

TREES (most are very small seedlings or freshly rooted cuttings in 1 liter nursery bags)

  • Cinnamon (20)
  • Guanabanana (15)
  • Buddha’s Hand Citrus (5)
  • Meyer Lemon (8)
  • Primavera (3)
  • Lychee (5)

CULINARY HERBS (most are well established plants in 1 liter plastic nursery bags.

  • Black Pepper (10)
  • Curry Leaf (5)
  • Hoja Santa (8)
  • Lemon Grass (20)
  • Cuban Mojito Mint (5)
  • Bronze Fennel (3)
  • Blue Tequila Agaves (4)

MEDICINAL & OTHER PLANTS (most in 1 liter plastic nursery bags)

  • Aloe Vera (10)
  • Gotu Cola – Centella (20)
  • Stevia (5)
  • Sinicuiche (5)
  • Fruit Scented Honduran Sage (5)
  • Assorted Scented Jasmines (5)
  • Baby Hawaiian Woodrose (10)
  • Patchouli (5)
  • Calea (3)

INDIVIDUAL RARE PLANTS

  • Catha edulis (a couple at 200 pesos each)
  • Yerba Mate (a few at 100-200 pesos each)
  • Psychotria viridis (a few at 200 pesos each)
  • Banisteriopsis Caapi (a couple at 200 pesos each)
  • Plumeria – Frangipani: assorted named varieties each 3 years old (100 pesos each)

FREE PLANTS

  • assorted basil plants
  • assorted other plants that we will toss if no one wants them

Plants are trying to kill us…

Unearthing deeply rooted plant ‘myths’

by JOANNE HUNT
Tue, Apr 19, 2011

While a few plants can be used to cure disease, most are only effective as placebos, according to an expert

‘PLANTS HAVE been trying to kill us, not cure us,” says Dr Henry Oakeley, the garden fellow at London’s Royal College of Physicians.

Not a comment you might expect from a man who oversees a garden of 600 plants used in medicine for 3,000 years, a man you’d expect to extol medicine’s indebtedness to the plant kingdom.

In Dublin to open a medicinal garden at Trinity College to mark 300 years of botany at the college, he’s well aware that his “very anti-herbal medicine” stance and will jar with some.

“I [nearly] got lynched when I gave this lecture at a herbal medicine conference,” says the former physician and psychiatrist, who is passionate about botany.

But if plants are, for the most part, as medicinally useless as he believes, how does he explain their centrality to the beliefs and practices of medical practitioners for centuries?

“Because they believed in the tooth fairy,” he says matter of factly. “They had no concept of illness or of chemistry or biochemistry. They believed all plants had been put on the earth by the creator for mankind’s use. So if the plant had a particular shape, it indicated that the creator had put it on the planet for a particular use.”

Citing as an example the use of blue liverwort, Hepatica nobilis , once cultivated as a liver tonic because its three-lobed leaf form mirrored the shape of the liver, he says, “It was absolute rubbish. They had no idea how the body worked.”

In the 1880s, at the height of its popularity, those taking it to cure feelings of “liverishness” were stuck down by jaundice because the plant was in fact toxic to the liver.

“The basic concept that most people have missed is that [many] plants are poisonous,” he says. “We just have to find a way of using the poisons in plants to our advantage.”

While early doctors may have had little concept of how things worked in the body, the effects of plants on the brain were more observable.

“Opium for example: if you take a little you feel happy, a bit more and you are disinhibited, more and you start to fall asleep and feel no pain. So it was used as a painkiller from very early on,” he says.

Early physicians knew also that deadly nightshade, more commonly known as belladonna, was fatal.

“But if you took a small dose, you would hallucinate, have a dry mouth and dilated pupils – hence the name “belladonna” – and you’d become unconscious so a doctor could do things like amputate, or cauterize wounds.”

However, Oakeley dismisses suggestions of belladonna’s efficacy as a modern-day homeopathic remedy. He says the fact that a plant may have been used in medicines for thousands of years doesn’t lend such claims any more weight.

“In most cases it’s been a myth from day one,” he says. “Homeopathic medicine is a complete fairy tale. To a put a molecule of a chemical into gallons of water: there’s no reason why it should work. The only response you get from homeopathic medicines is a placebo response.

“It [a homeopathic remedy] may do good [through this] placebo effect . . . if you have a good homeopath, his or her placebo response will be better than just drinking water.”

Of the peonies in the garden at his place of work, he says, roots hung around the neck were regarded as a cure for epilepsy by Galen as far back as AD 200, with the plant cropping up again in a 1737 book called A Curious Herbal as a cure for febrile fits in teething children.

“Nailing a brick to a wall would have been just as effective,” he remarks. “Febrile fits are self-limiting and will stop when the fever subsides anyway.”

However, he concedes that some plants used by the ancients did have curative properties – and continue to have a place in medicine today.

Used in Egypt for centuries to treat renal colic, khellin, a member of the cow parsley family, was found in the 1920s to cause dilation of the urethra and the coronary arteries. As a result of the discovery, drugs have been developed that treat angina and cardiac arrhythmias today.

A 16th-century GP William Withering found that a patient of his was cured of dropsy (heart failure) after taking foxglove leaf prescribed by a herbalist. A chemical extracted from foxglove leaf is now the source of the modern day cardiac medicine digoxin.

A more recent example is the plant Chinese star anise, the seedpods of which are used to make shikimic acid from which Tamiflu, the treatment for bird and swine flu, is made.

Nevertheless, he says, the number of plants that have evolved from herbal medicine to real medicine is tiny. “The thousands of years of plants being used as medicines have actually taught us very little.”

Welcoming forthcoming UK legislation that will be stricter on the prescription of herbal medicines, he says the claims by some that they have fewer side effects are misleading.

St John’s Wort, for example, a herbal remedy used for depression, can work by blocking the destruction of serotonin, he says – and side effects include the possible inactivation of the heart drug warfarin, oral contraceptives and HIV treatments.

“Herbalists say these things are pure and don’t have the same side effects as Prozac, [but] they have other side effects . . . That’s the problem with herbal medicine, there is no proper long-term check on the side effects.

“People have faith in herbal medicine and if you have faith in something then it has an effect. The only thing wrong with [herbal medicine] is that it may have a side effect. Also, you may not be treating the illness.”

Oakeley is cognisant of the fact that his own view of medicine also represents a moment in time.

“In 60 years’ time, our current medicines will seem as rudimentary as peony root . . . just as we [currently] treat pneumonia by treating the bacteria that causes it, we will treat diseases like cystic fibrosis, schizophrenia and Alzheimer’s by treating the gene which causes them.

“I promise you, in 50 to 100 years’ time, people will be as rude about most of the medicines we take today as I am about peony root.”

© 2011 The Irish Times

Dreams: Night School

Dreams: Night School
A hundred years after Freud, one man may have figured out why we dream. You’ll never think the same way about nightmares again.

By: Jay Dixit
The Dream Robbers

What happens when a rat stops dreaming? In 2004, researchers at the University of Wisconsin at Madison decided to find out. Their method was simple, if a bit devilish. Step 1: Strand a rat in a tub of water. In the center of this tiny sea, allot the creature its own little desert island in the form of an inverted flowerpot. The rat can swim around as much as it pleases, but come nightfall, if it wants any sleep, it has to clamber up and stretch itself across the flowerpot, its belly sagging over the drainage hole.

In this uncomfortable position, the rat is able to rest and eventually fall asleep. But as soon as the animal hits REM sleep, the muscular paralysis that accompanies this stage of vivid dreaming causes its body to slacken. The rat slips through the hole and gets dunked in the water. The surprised rat is then free to crawl back onto the pot, lick the drops off its paws, and go back to sleep, but it won’t get any REM sleep.

Step 2: After several mostly dreamless nights, the creature is subjected to a virtual decathlon of physical ordeals designed to test its survival behaviors. Every rat is born with a set of instinctive reactions to threatening situations. These behaviors don’t have to be learned; they’re natural defenses, useful responses accrued over millennia of rat society.

The dream-deprived rats flubbed each of the tasks. When plopped down in a wide-open field, they did not scurry to the safety of a more sheltered area; instead, they recklessly wandered around exposed areas. When shocked, they paused briefly and then went about their business, rather than freezing in their tracks the way normal rats do. When confronted with a foreign object in their burrow, they did not bury it; instead, they groomed themselves. Had the animals been out in the wild, they would have made easy prey.

The surprise came during Step 3. Each rat was given amphetamines and tested again; nothing changed. If failure to be an effective rat were due to mere sleep deprivation, amphetamines would have reversed the effect. But that didn’t happen. These rats weren’t floundering because they were sleepy. Something else was going on, but what?

What Dreams Are Made Of

Dreaming is so basic to human existence, it’s astonishing we don’t understand it better. It consumes years of our lives, and no other single activity exerts such a powerful pull on our imaginations. Yet central as dreaming is, we still have no idea why we dream. Freud saw dreams as convoluted pathways toward fulfilling forbidden aggressive and sexual wishes; frightening dreams were wishes in disguise, wishes so scary, he believed, they had to transmute themselves into fear and masquerade as nightmares.

Later came the idea that dreams are the cognitive echoes of our efforts to work out conflicting emotions. More recently, dreams have been viewed as mere “epiphenomena,” excrescences of the brain with no function at all, the mind’s attempt to make sense of random neural firing while the body restores itself during sleep. As Harvard sleep researcher Allan Hobson puts it, dreams are “the noise the brain makes while it’s doing its homework.”

“There’s nothing closer to a consensus on the purpose and function of dreaming than there’s ever been,” says Deirdre Barrett, a Harvard psychologist and editor of the forthcoming The New Science of Dreaming. Indeed, no theory has been able to reconcile the findings of various subdisciplines of dream science. Until now.

Finnish psychologist Antti Revonsuo believes the marooned rats lost their ability to defend themselves not because they were exhausted but because they were robbed of their dreams. Dreams, he contends, are a training ground in which animals and people alike go over the behaviors that are key to their survival. Prevented from dreaming, the rats were unable to rehearse their survival behaviors. In other words, they were defenseless because they were out of practice.

A Theater of Threats

Say you’re in a fight and somebody wraps his arms around you from the front, pinning your arms to your sides, a bear hug. Most people reflexively stiffen their body. But this is actually the worst thing to do; making your body rigid makes you easier to lift, and lets your assailant pick you up and drop you on your head, or worse, haul you off somewhere.

Better to bend your knees and lower your center of gravity so you’re harder to lift. You’re then free to punch your aggressor’s testicles, claw the skin on his back, kick out his knee, stomp his foot, even bite his neck, unappetizing options, but effective against even the biggest thug.

The difference between the typical and optimal response could save your life. But making such a reaction swift and automatic takes practice. It’s the reason martial arts students drill their movements over and over. Frequent rehearsal prepares them for that one decisive moment, ensuring that their response in an actual life-or-death situation is the one they practiced.

Dreams may do the same thing. A dream researcher at the University of Turku, in Finland, Revonsuo believes that dreams are a sort of nighttime theater in which our brains screen realistic scenarios. This virtual reality simulates emergency situations and provides an arena for safe training. As Revonsuo puts it, “The primary function of negative dreams is rehearsal for similar real events, so that threat recognition and avoidance happens faster and more automatically in comparable real situations.”

Faced with actual life-or-death situations, traffic accidents, terrorist attacks, street assaults, some people report entering a mode of calm, rapid response, reacting automatically, almost without thinking. Afterward, they often say the episode felt unreal, as if it were all a dream. Threat simulation, Revonsuo believes, is why.

A Season in Hell

As a grad student in psychology in the early 1990s, Revonsuo often had bad dreams. What struck him the most was how lifelike they were. “I would say to myself, in my dream, ‘Oh shit! I’ve dreamt of this before, but now this is really happening!’ ” he recalls.

“Credible world analogs” are what cognitive psychologist David Foulkes calls dreams. Although we tend to dwell on the bizarreness of dreams, most dreams are quite mundane, Foulkes notes. You move around, talk, run, interact with others, experience emotions, and feel the passage of time, just as in everyday life.

When Revonsuo began studying dreams, he asked his students to start keeping logs of their own nocturnal escapades. He noticed something striking. The dreams were filled with dangerous events, negative emotions, monsters, chases, escapes, fights, and near-death experiences. The dream world was a hellscape of danger, teeming with threatening events far more sinister than in waking life.

These weren’t the misfirings of diseased brains. Threat dreams were the norm, accounting for a staggering two-thirds of all dreams. Revonsuo discovered that we grossly underestimate the number of nightmares we have. As it turns out, we have 300 to 1,000 threat dreams per year—one to four per night. Just under half are aggressive encounters: physical aggression such as fistfights, and nonphysical aggression such as verbal arguments. The rest are about car crashes, falling and drowning, missing a meeting or a test, being lost or trapped, and being naked in public. The whole dream world seemed to have a negative bias: more negative emotions than positive ones, more misfortune than good fortune, more nightmares than fantasy.

A Theory Is Born

In the ancestral environment, Revonsuo reasoned, our dreams served to protect us, teaching us how to respond when a wild animal was chasing us or when we got lost in the forest. That was why the dream world was so filled with peril: to simulate the potential threats and prepare us to react quickly. But how could dreams help us select the optimal response, given that dream recall is so fragile? After all, we remember only a few of our dreams, and even those fade fast in the tumult of the day.

Revonsuo believes that by providing rehearsal, dreaming helps us recognize dangers more quickly and respond more efficiently. We don’t need to be aware of this rehearsal, just as you don’t have to recall exactly where you practiced your tennis serve in order to reap the rewards.

The idea that dreams are a dojo for perfecting waking activities fits well with what is already known about practice. Mental rehearsal through visualization improves skills, enhances learning, and changes the brain, polishing performance in almost any domain, from sports to piano playing.

The single most pervasive theme in dreaming is that of being chased or attacked. Just as athletes in training repeat parts of their performance, we may, in our nightmares, be attacked and chased over and over again, not to solve a particular problem but to actually practice efficient escape behavior.

Saber-toothed tigers no longer stalk our villages, but Stone Age themes still rule our dreams. “Nowadays, the evolutionary footprint is clearest in the dreams of children, who often dream about being chased by monsters, much the same way we were once chased by predators,” says Revonsuo. As life has evolved, so have the threats we rehearse. “You insert a modern danger into that ancestral key and get a bizarre combination,” says Revonsuo. “We dream of being chased, shot, or robbed, getting into traffic accidents, a burglar in our house, or perhaps smaller mishaps such as losing our wallets, and that prepares us for our waking life.”

The dreaming brain, explains Revonsuo, scans emotional memories. When it detects a memory trace with a strong negative emotion, it constructs a nightmare around that theme. The more traumatic the event, the more intense the nightmare. The brain’s system for detecting threats is sensitive and flexible: Anything the brain tags with a strong negative charge gets thrown into the threat bin and dredged up at night.

Sometimes this system works well: Dreaming about a boy running in front of our car better prepares us should that danger crop up in real life. But sometimes the modern world throws the threat-detection mechanism out of whack: Watching horror movies can trigger nightmares about vampires, ghosts, aliens, or zombies. Such “nonsense nightmares” don’t rehearse any useful threats; they’re like an allergic reaction, says Revonsuo. Just as our immune system can mistake pollen for a pathogen and mount a defensive campaign, the threat-detection system misperceives horror movies and deploys its defenses by generating a nightmare.

Heroes of Our Own Dreams

In the jungles of the amazon lives a tribe called the Mehinaku. The Mehinaku lead the traditional life of hunter-gatherers. They spend their days fishing and gathering roots. Since they believe that dreams predict the future, they are scrupulous about remembering them and sharing them with others. That makes them perfect for an ethnographic study of dreams. In 1981, anthropologist Thomas Gregor surveyed their dreams and analyzed the content.

As it turns out, the Mehinaku dream profusely about the dangers in their everyday lives: being attacked by wild pigs; chased by jaguars; bitten by snakes; stung by wasps, ants, or bees, all potentially lethal. “Their dreams simulate over and over again what to do and how to do it quickly when they spot these animals in the wild,” reports Revonsuo. Across a tribesman’s lifespan, a single failure to react efficiently could be fatal. If threat simulation even marginally increases the likelihood that such fatal failures won’t occur, it would prove adaptive.

If the threat-simulation theory is correct, dreams should focus on the self, and when confronted with a threat, the dream self should react realistically to ensure its own survival and that of its loved ones. And so it is. We are the heroes of our own dreams. We don’t dream about other people’s adventures or about fictional superheroes battling monsters. We dream about ourselves.

If dreams evolved to simulate the threats in our environment, then being exposed to more dangers in real life should activate the nightmare function, over stuffing our dreams with threats. This is precisely what happens. Even a single exposure to a life-threatening situation can plunge a person into an inferno of post-traumatic nightmares, dreams in which the threatening event, the attack, the rape, the war, is repeated over and over in every possible variation.

Studies of traumatized Iraqi and Palestinian children who grew up in extremely violent environments, some of whom witnessed their parents’ deaths, show that their dreams are phantasmagoric carnivals of threatening events. People who watched more television on September 11, 2001, and saw threatening images were more likely to dream about the events of that day; people who merely talked about it with others were less likely to dream about it.

Traumatic dreams do seem to rehearse relevant threats. Just four weeks into the first Gulf War, as Scud missiles were raining down on Tel Aviv and Haifa, the war was already encroaching on the dreams of Israeli college students, according to a study. The most prominent topic: gas masks.

But not all our dreams contain threats. That’s not surprising, says Revonuso. There’s no reason a biological system has to express its function at all times. Many bodily systems spring into action only in critical situations. Take sperm cells. The average man ejaculates over 100 million sperm at a time, yet over the course of his life, only a few will ever accomplish their biological mission of fertilizing an egg. Every day, millions of sperm are wasted, and while this may, as Monty Python sings, make God quite irate, it doesn’t mean that sperm cells have some function other than fertilizing eggs and competing with other sperm.

The Nighttime Edge

Intriguing as Revonsuo’s theory is, not everyone is sold on the idea that dreams are primarily a theater of threat rehearsal. Dream researchers have known for centuries that dreaming helps problem solving, for example, but they still do not know why.

Some researchers argue that dreams are designed specifically to help us come up with creative solutions. But if that’s the case, it’s infuriatingly inconsistent, and complicated by the fact that we rarely remember our dreams.

Those who awake with brilliant solutions to scientific or artistic problems are the exception. German chemist Friedrich August Kekul struggled to find the molecular structure of benzene until he dreamed about a snake devouring its own tail and realized benzene was a closed circle, a ring. The self-taught Indian mathematician Srinivasa Ramanujan came up with every one of his proofs in dreams. Paul McCartney dreamed “Yesterday,” woke up, and wrote it down.

Problem solving may be a side effect of the simulation system. The mere fact of running scenarios over and over may inevitably generate new solutions. That’s why when we have an important decision to make, we like to “sleep on it” first, why, according to a study by University of Maryland psychologist Clara Hill, couples who dream about their relationship are more likely to resolve their conflicts than couples who don’t.

It’s also known that we get better at tasks just by dreaming about them. Robert Stickgold, a sleep researcher at Harvard Medical School, has found that if you time people as they tap out the sequence 4-1-3-2-4 with their fingers, then ask them to do it again later that day, they are no better.

But let them sleep in between and their performance improves, literally overnight. The implication seems obvious: Sleep provides practice. People given brainteasers before bed dream about the answers. Math students are all too familiar with dreams about algebra problems. Anyone who’s ever played too much Tetris knows you can start having Tetris dreams.

Stickgold holds that dreaming is much more complex than rehearsal. He points, for example, to the ability of sleep to allow us to integrate and consolidate knowledge. During sleep, our brains are making sense of the world, discovering new associations among existing memories, looking for patterns, formulating rules. “That’s how we create meaning,” says Stickgold. “Our brain puts things together.”

Dreams do have a certain edge over conscious thought. Neuroimaging work has shown a distinct pattern of activation and inhibition in the dreaming brain. Visual and emotional centers are abnormally activated, while censoring mechanisms are deactivated. When we try to visualize during the day, imagery is thin and insubstantial, less real than the real world. But studies suggest that vivid hallucinations during dreaming rival the clarity and detail of vision itself.

“Dreaming is a sensitive system that tries to pay much attention to the threatening cues in our environment,” Revonsuo concludes. “Their function is to protect and prepare us.”

“Yes,” says Harvard’s Barrett, “dreams are worrying about disasters. But they’re also planning for nice things and they’re fantasizing and they’re problem solving.”

She contends that the purpose of dreaming is “as broad as all waking thought. That’s why I say dreams are really just thinking in a different biochemical state.”

Psychology Today Magazine, Nov/Dec 2007
Last Reviewed 5 Dec 2007
Article ID: 4448

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