
Óni · ayahuasca, the vine
Banisteriopsis caapi
The vine itself — not the brew. Cut, pounded and cooked for many hours with the leaf. In our materials óni is the plant; the ceremony is something you do with it.
The Shipibo word usually translated "medicine" covers far more than treatment. It names a whole category of relationship between people and plants.
Shipibo teaching The Shipibo name comes first, in bold. Where a name is still with the speakers recording this course, we mark it. We publish a name when it comes from someone who speaks the language.

Banisteriopsis caapi
The vine itself — not the brew. Cut, pounded and cooked for many hours with the leaf. In our materials óni is the plant; the ceremony is something you do with it.

Psychotria viridis
The leaf cooked together with the vine. Its Shipibo name is one of the things we have asked our speakers for — chakruna is Quechua, not Shipibo.

Nicotiana rustica
Far stronger than the tobacco in a cigarette, and used almost everywhere: blown over a patient, drunk, smoked, kept close. People who know only cigarettes are always surprised by how central it is.

Cyperus articulatus
A family of sedges, grown deliberately. Different varieties are kept for different purposes — healing, skill, protection, and for the hand that embroiders kené.

Mansoa alliacea
Smells of garlic; nothing to do with garlic. Dieted for clarity and for cleaning heaviness out of the body.

Calliandra angustifolia
A riverbank tree with pink filament flowers. Associated with the heart, and with opening a person rather than hardening them.

Brunfelsia grandiflora
Named for the cold it produces — the body shivers while the plant works. A serious diet, not a beginner's.

Couroupita guianensis
The bark is dieted for strength and protection. One of the plants people mean when they speak of a diet that defends you.

Maytenus macrocarpa
Bark, usually in aguardiente or as a decoction. Taken for the back, the joints, and for endurance.

Ficus insipida
A strangler fig that grows down into itself. Used for binding — for what has come apart, in the body and otherwise.

Jatropha gossypiifolia
Planted at the edge of a house. Used in cleansing baths and in protection.

Tabernaemontana undulata
Dieted for memory and for grief — the plant people name when something has to be carried differently.
What outsiders most often miss: in Shipibo practice, the plant is rarely the point by itself. The point is the trained relationship — formed through dieta, maintained through discipline, expressed through song — bewá. A brew without that relationship is, in the traditional view, just a brew.
The most useful thing in the medical record is a division that visitors almost never hear, because the retreat economy only sells one half of it.
Injury is treated as injury. Snakebite, fractures, burns, cuts, stingray wounds, bites, stings, poisoning from a plant handled wrong — these have obvious causes and they have ráo, herbal remedies, in great number. Hern, a physician who watched them used for thirty years and had every professional reason to be sceptical, wrote that some of them work amazingly well. This is the everyday pharmacy, it is not mysterious, and most adults know a good deal of it.
Illness without an obvious cause is the other category. Fevers that will not break, paralysis, a birth that goes wrong, a child born different. Those were traditionally referred to the spirit world, and that is where the songs and the night sessions belong — not because Shipibo people cannot tell a fracture from a fever, but because these are two different problems and each has its own instrument.
Almost everything a foreigner encounters sits on the second track. The first one — the plant that stops the bleeding, the leaf for the burn, the everyday competence spread across a whole community — is the part nobody sells, and it is very likely the larger half.
Follow tobacco through the sources and it turns up at every stage, doing something specific each time. Smoke is blown over a patient’s body during a healing session to carry the song. Smoke is blown over a child held inside a mosquito net while the healer sits outside. In the 2021 study, mapacho — Nicotiana rustica, the strong tobacco — is described by the practitioners as the working plant ally of the ceremony: it transmits the icaros, clears heaviness, and holds the protection in place.
It reaches back further than that. The older record describes a small ornamented clay pot kept for tobacco medicine, paired with the ceremonial pipe as the two most important things a healer owned. And it carries a direction: smoke rises. One account has a healer crouched under a lupuna, blowing smoke at the ground and weeping, so the smoke goes up and brings the rain and his tears become it. Another has the people who live beneath the water unable to bear tobacco smoke at all.
Whatever else is true, tobacco is not the accompaniment. It is the instrument the song is delivered with.
The picture sold abroad has one shaman and a room full of patients. The record describes something flatter. Writing from thirty years in Shipibo villages, the physician-anthropologist Warren Hern put it directly: to some extent all Shipibo are medical practitioners, because herbal and folk knowledge was available to everyone. Your grandmother knows what to do about that. The exception — the one role with powers that are both earned and attributed — is the seer.
The word is meraya. Two writers, two decades apart, reach for the same role and describe it the same way — the one who sees, standing above every other kind of practitioner — and both note the same unglamorous detail: he fishes, he hunts, he tends his garden. It is not a full-time profession. Roe glosses it as one who sees ahead rather than one who cures.
Hern also describes what a session actually contains, and only part of it is song. The healer talks with the patient — Hern says it sounds remarkably like a Western psychotherapist — blows tobacco smoke over the body, and rustles bundles of dried plants over the affected place. It runs for hours. And it is sparsely attended, very late at night, which he sets against bone-setting: that happens in broad daylight with a crowd watching. The serious work is the quiet work.
Warren M. Hern, “Shipibo,” Encyclopedia of Medical Anthropology, vol. 2, 2004, where the word is transcribed differently; Peter G. Roe, The Cosmic Zygote, 1982, note 12. We spell it the way our course and our teachers spell it.
This is the idea underneath all of it, and it is old in the written record. Rafael Karsten, working on the Ucayali, put it plainly: every particular tree and plant has an indwelling spirit that is the principle of its life and growth, so that felling a tree is an offence against that spirit — and the word people used for it, he wrote, was the plant’s mother, which they equated with its soul. Peter Roe, quoting him fifty years later, added that this emphasis on plant spirits, each governing its own species, is a particular feature of Shipibo thought rather than a generic Amazonian one.
Read that back against the pages above and the practice stops looking like herbalism. If a plant has a mother, then dieting it is not extraction, it is introduction — you are not taking a compound, you are being taught by someone. That is why a dieta has rules about food, sex, and company; you are keeping conditions for a relationship. It is why the songs matter, and why the same word covers the plant, the medicine, and the power: ráo. And it is why a Shipibo healer will ask who taught a plant to you before asking what it does.
The same record names one tree above the others. The lupuna — written shóno in 1982 — grows 25 to 50 metres with a spreading umbrella crown, and older Shipibo would point one out to anyone walking with them. Its sap was held to be dangerous; its spirit was said to appear to a person under ayahuasca as a figure smoking an enormous pipe. In one reading it is the tree that holds the layered worlds apart, and cutting it releases a flood.
Sources: Rafael Karsten, Studies in the Religion of the South American Indians East of the Andes (1964, pp. 198–202), quoted in Peter G. Roe, The Cosmic Zygote, Rutgers University Press, 1982, pp. 118–119. Both are outsiders writing decades ago. The framing is theirs; where a Shipibo teacher puts it differently, the teacher is the source and this paragraph changes.
How an onanya (healer)'s relationship with plants is actually built — and what the songs have to do with it — is the subject of the cosmology introduction and, in full depth, our forthcoming guide and advanced courses.
Beyond the plants every visitor hears about, Shipibo onanyabo — healers draw on a broad living pharmacy — teacher plants dieted over months, and everyday remedies for the body's troubles. A selection, by the names most used in the region:
Some of what has been written about this elsewhere: a 2021 observational study in Frontiers in Pharmacology (González et al.) followed participants in Shipibo ceremonial ayahuasca use and reported improvements in well-being measures. It is one study, in one context. The practice does not depend on it.