Lanmaoa Asiatica: The Mushroom That Makes You See Tiny People

Published April 21, 2026 — Psilocybin Science & News

Lanmaoa asiatica is a mushroom that does something no other fungus on Earth is known to do reliably: it makes you see tiny people. Imagine sitting down to eat a stir-fry, and ten minutes later noticing hundreds of tiny figures — no taller than your thumbnail — marching in formation across your tablecloth. You lift the cloth to look underneath, and their heads detach and stick to the bottom. The bodies, however, keep marching. You measure them: exactly 2 centimetres tall. This is not a story from a novel — instead, this is a real account from a professor at a Chinese university, reported to researchers studying the mushroom that reliably causes what scientists call lilliputian hallucinations.

Unlike magic mushrooms, which contain the well-studied compound psilocybin, Lanmaoa asiatica contains no known psychoactive compound at all. Chemical analysis has found nothing — no psilocybin, no muscimol, no tryptamines, nothing on any known list of hallucinogenic molecules. And yet, it sends hundreds of people to hospital every summer with identical, reliably reproducible visions of tiny people. As a result, it has become one of the most scientifically fascinating and mysterious mushrooms on Earth.

What Is Lanmaoa Asiatica?

Lanmaoa asiatica is a bolete mushroom — the same family as the common porcini — that grows in the pine forests of Yunnan Province in southwest China. Specifically, it forms a symbiotic relationship with the Yunnan Pine (Pinus yunnanensis), growing from the soil at the base of trees during the rainy season from June to August. Its local name is jian shou qing (見手青), and it is widely sold in markets, served in restaurants, and cooked at home as a valued wild delicacy for its rich, earthy, umami flavour.

Although the species was only formally described by science in 2015, the hallucinations it causes have, in fact, been documented for much longer. The earliest hospital report, published in 1991 by a clinic in Yunnan, described 300 cases of what locals called xiaomei niuganjun poisonings — with effects including vivid hallucinations beginning 6 to 24 hours after eating. Moreover, reports from Papua New Guinea describe almost identical effects as far back as the 1930s. Notably, a Daoist text from the 3rd century CE refers to a “flesh spirit mushroom” that, when eaten raw, allows one to “see a little person” and “attain transcendence immediately.”

What People Actually See

In contrast to psilocybin or any other known psychedelic, the hallucinations caused by Lanmaoa asiatica are entirely specific and consistent — not abstract patterns, swirling colours, or ego-dissolving experiences, but tiny humanoid figures, typically described as elves, people, or spirits, moving autonomously in the real-world environment around the person. Read our guide on how psilocybin works to understand just how different that mechanism is.

Hospital records from Yunnan show that 96% of patients who sought treatment after eating this mushroom reported seeing “xiao ren ren” — little people. These figures are consistently described as:

One tribesman in Papua New Guinea described seeing “tiny people with mushrooms around their faces, teasing him and chasing him.” In another account, a man watched the figures enter through a gap under his door, parade across the room, and exit through a window. What is most striking to researchers, however, is the consistency: across unrelated individuals and cultures, the visions are nearly identical — so much so that scientists treat them as a reliable pharmacological signature of the mushroom.

The Same Hallucination on Three Continents

One of the most striking facts about this mushroom is that the same hallucinations have been documented independently in three geographically separate populations — with no historical contact between them whatsoever.

In 2024, researcher Colin Domnauer travelled to the Philippines to collect mushroom specimens from communities reporting these effects. DNA sequencing subsequently confirmed that the Philippine mushroom is Lanmaoa asiatica — the exact same species as in Yunnan, separated by over 2,000 kilometres of ocean and mountains. This finding was first reported widely by BBC Future in January 2026 and further detailed by the Natural History Museum of Utah. It effectively rules out cultural transmission or coincidence: three isolated populations independently documented identical hallucinations from the same fungal species.

The Scientific Mystery: No Known Compound

This is where the story becomes genuinely extraordinary, even in the context of other psychedelic substances. Remarkably, chemical analysis conducted at the Natural History Museum of Utah has found no traces of any known psychoactive compound in Lanmaoa asiatica:

Furthermore, genetic analysis has ruled out horizontal gene transfer from known hallucinogenic species such as Amanita or Psilocybe — a mechanism that could otherwise have explained how the mushroom acquired psychoactive properties. Interestingly, its closest genetic relative is a common porcini-type mushroom found in North America, a species with no known psychoactive properties whatsoever. This, therefore, strongly suggests that whatever compound is responsible, it evolved through an entirely different biochemical pathway than any known psychedelic.

The Hunt for the Unknown Compound

As a result of these findings, laboratories in Utah and Yunnan are currently racing to isolate the active molecule. The research method being used is called bioassay-guided fractionation: in short, the mushroom extract is split into progressively smaller fractions, each tested in turn on mice, until the specific molecules responsible for the behavioural effects are identified.

Colin Domnauer, a PhD student at the University of Utah and the Natural History Museum of Utah, together with mycologist Bryn Dentinger, have confirmed that chemical extracts of Lanmaoa asiatica produce consistent behavioural changes in mice — hyperactivity followed by a prolonged stupor — that closely mirror the human experience. This consequently confirms that a pharmacological mechanism is indeed at work. The research team was preparing findings for publication through late 2025 and into 2026.

If the compound is successfully isolated, it could therefore represent the discovery of an entirely new class of psychoactive molecules — not a derivative of psilocybin, not related to anything on any existing list. Such a discovery would be a landmark event in the neuroscience of consciousness and in psychedelic research more broadly.

How It Compares to Magic Mushrooms

In practice, the effects of Lanmaoa asiatica are entirely different from those of classic magic mushrooms (Psilocybe cubensis) and magic truffles. In particular, the nature of the hallucinations, the duration, and the safety profile differ considerably:

Why This Discovery Matters for Psychedelic Science

Ultimately, the story of Lanmaoa asiatica matters well beyond its fairy-tale imagery. In essence, it demonstrates that the human brain can be reliably pushed into one of its most unusual states — vivid, autonomous hallucinations of tiny beings — by a compound that science has not yet identified or described. This, in turn, raises profound questions about how the brain generates conscious experience and about how many other unknown psychoactive molecules may still exist in nature.

The consistency of the hallucination across cultures and continents is, moreover, quite remarkable. Most psychedelic experiences are highly shaped by expectation, culture, and environment — what researchers call set and setting. However, the Yunnan professor and the Papua New Guinea tribesman shared no cultural framework for “tiny people who march like soldiers.” Yet, independently, they described exactly that. This level of pharmacological consistency is almost without parallel in psychedelic research.

For those interested in the broader science of how mushrooms affect the mind, this is therefore a story well worth following closely. The compound will almost certainly be identified within the next few years, and when that happens, we may be looking at the starting point for an entirely new branch of consciousness research.

Quick Facts at a Glance